JP3510082B2 - Electrical products equipped with low-temperature curing type highly active oxide photocatalytic thin films - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a product of antibacterial effect, antifouling effect and deodorizing effect for example on the surface of a plastic or a coating material by forming an oxide photocatalyst film on the surface of a part in an air flow path and adding specified ions in the oxide photocatalyst film. SOLUTION: Ions of elements of electronegativity of less than 1.6, the ion radius of 0.2 nm or less and the valency of 2 or less are added in an oxide photocatalyst film in which TiO2 particles as an oxide photocatalyst are dispersed. A driving force fan 6 of a capacitor motor 7 of a filtration type air cleaner main body is rotated to form an flow. Indoor air containing dust, smoke, oil fine particles, microbes, dead bodies of microbes, pollen, malodor and the like is sucked from a panel (suction hole) 2 by the air flow. The sucked air is exhausted out of outlet of grille 14 after being filtered and cleaned by a filter section 3.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an article provided with an oxide photocatalytic thin film. The present invention relates to an organic polymer material which is a material having low heat resistance, and particularly to an article in which an oxide photocatalytic thin film is formed in a thin layer on the surface of a general-purpose thermoplastic plastic part. Further, the present invention relates to a UV lamp or an article which is not provided with strong UV rays such as outdoor sunlight and is suitable for indoor use, which is provided with an oxide photocatalytic thin film on the whole or part of the surface thereof.

For example, an air cleaner, a ventilation fan, a fan, a vacuum cleaner, a clothes dryer, a tableware dryer, a dishwasher, a garbage processor, a heater, a humidifier, a dehumidifier, an air conditioner, a heating cooker, an electromagnetic cooker. , A device for creating an air flow by using an electric blower such as a hair dryer, a deodorizer, and a kotatsu.

Various dirt components and microorganisms floating on the air attached to the surface of these electric products are decomposed by light in a living environment by a photocatalytic function to prevent stains and deodorants. The present invention relates to a technique for obtaining surface characteristics such as antibacterial, mildew-proof, and improved wettability, and its article.

[0004]

_2. Description of the Related Art In recent years, materials that exhibit antifouling, deodorizing and antibacterial effects by utilizing the decomposition action of organic substances using a TiO ₂ photocatalyst have attracted attention. This uses a redox reaction of a semiconductor photocatalyst as described in New Ceramics (1996) No. 2,55, and a TiO ₂ thin film formed in a ceramic style is provided.

On the other hand, as a film forming method, an oxide thin film is formed on a substrate by a physical method such as sputtering or a chemical method such as a coating method such as a sol-gel method. The former can form a film at a low temperature by using a vacuum device or the like. The latter can be applied to a substrate with a simple device such as a spin coat or a spray, and usually a film can be obtained by treating at a temperature of several hundreds of degrees Celsius. It has been reported that anatase type crystals are effective for TiO ₂ which is a material for antibacterial deodorization, and crystallization is effective for exhibiting functions (Pate.
nt No. (PTC) WO 94/11092, (PTC) WO 95/15816). In addition, it has been reported that V, Fe, etc. were added to TiO ₂ to improve performance (W. Choi, A. Termin, MRHoffmann, J. Phys. C.
hem., 98, 13669-13679 (1994)).

The following inventions are known as cases in which the oxide photocatalytic thin film is applied to various devices by using the above materials and methods.

An air purifier, that is, a device for removing dusts and malodorous substances in the room air is disclosed in JP-A-8-266841, JP-A-8-266605 and JP-A-8-309148. This is a technique in which a filter carrying a photocatalyst containing TiO ₂ as a main component is included and a mechanism for irradiating light of a short wavelength by using a means such as an ultraviolet lamp is provided in the publication.

As an example of application to a fan, Japanese Patent Laid-Open No.
As described in 7-303819, the surface of a metal component has Ti
A technique is known in which a thin film of a photocatalyst containing O ₂ as a main component is baked at about 600 ° C.

Also in the case of application to a fan as in JP-A-9-38189, a mechanism in which a light emitting diode is attached to irradiate ultraviolet rays is known.

An example of application to a ventilation fan is Japanese Patent Laid-Open No. 5-1
There is known a structure in which an ultraviolet lamp as disclosed in Japanese Patent No. 57305 is used together.

As an application example of a deodorizing filter installed in a ventilation path of a vacuum cleaner or a garbage disposal machine, a photocatalyst containing TiO ₂ as a main component as disclosed in JP-A-7-108175 is used. A technique has been proposed in which the material is made into a powder, wrapped with a plastic fiber sheet, and heat-sealed.

[0012]

There are insufficient points to form an oxide thin film on a substrate having low heat resistance, for example, a plastic part, by using the conventional technique. The film formed by the sol-gel method has an antibacterial tile as an antibacterial and deodorant material described in the above-mentioned document, but heat treatment at several hundreds of degrees Celsius, at least 300 degrees Celsius or more is required to crystallize titanium oxide. . Therefore, it is difficult to form a film on a substrate having low heat resistance such as plastics, especially general-purpose thermoplastic plastics.

In an environment such as indoors where the light intensity is low, the decomposition rate of TiO ₂ itself such as decomposition of organic matter is
This is not sufficient, and there is a problem in that a separate light source that is arranged is particularly required.

The above-mentioned devices targeted by the present invention are mainly home electric appliances used in indoor spaces such as general homes and offices. These products are mainly organic polymer materials ( Plastic) is used. With the exception of televisions and monitors for personal computers, which often use glass parts, about 40 to 50% by weight is plastic, and most of the rest consists of metals, as a material for parts of general household appliances. . In volume ratio,
Nearly 90% is made up of plastic. Plastic is widely used because it is easy to reduce the weight, has a good design, and is cheap in price. Among them, the heat-plasticized plastic is often used because of its high mass productivity in molding. It is used.

The most widely used general-purpose plastics as structural members are polypropylene (PP), acrylic butadiene styrene copolymer (ABS), styrene-acrylic copolymer (AS), polystyrene (PS),
Nylon (PA), polycarbonate (PC), vinyl chloride (PVC), methacryl (PMMA), polyethylene (PE), polyacetal (POM), polyethylene terephthalate (PET), polybutylene terephthalate (PBT) and the like can be mentioned. Material of 300 ℃
It cannot withstand deformation in an environment that exceeds

For example, ASTM, D-648 (18.6)
The heat distortion temperature of kg / cm ² ) is around 250 ° C. Polyphenylene sulfide, polyphenylene oxide, polyetherimide, etc., in which glass fiber or the like is kneaded as a special high heat resistant resin, are also available, but they are extremely expensive and cannot be used in large quantities for the above-mentioned applications.

Generally, the higher the heat resistance of the material, the higher the price, and PE and P are often used especially for exterior parts.
S, ABS, PP and PVC, which account for more than 75% of plastic parts on average. Even in ABS, which has the highest heat resistance among them, the above-mentioned ASTM heat distortion temperature is 120 ° C. or lower, and at 300 ° C., it completely melts and becomes a liquid, and oxidative decomposition proceeds.

Further, even when the surface of an inorganic material such as metal is coated with a paint, the material having heat resistance exceeding 300 ° C. is limited. Usually, a thermosetting resin is used for the paint. For example, polyester,
Acrylics, melamines, epoxies, urethanes and the like are typical examples, and baking is generally performed at a temperature of about 150 ° C. These paints also often cause problems such as loss of gloss and peeling off when exposed to an environment exceeding 300 ° C.

As shown by these data, there is a big problem in heat resistance in forming a film on a general-purpose material by the sol-gel method in the conventional technique.

On the other hand, physical methods such as sputtering, CVD, and vacuum vapor deposition, which are methods for forming a film within a temperature range not exceeding 300 ° C., require a large-scale apparatus such as a vacuum apparatus, which requires a high production cost. Is high. Moreover, since the film is formed under high vacuum during film formation, the composition ratio deviation of the oxide photocatalyst is large and the photocatalytic performance is deteriorated. Further, when an organic material is used as a substrate during film formation, there is a problem that it is reverse-sputtered and damages the substrate, resulting in deformation of the substrate. Further, in a chemical method by a coating method such as a sol-gel method, when a silica sol in which oxide fine particles are dispersed is used, film formation on a substrate having no heat resistance is
Since the heat treatment temperature is low, sufficient sintering cannot be performed, and the strength and water resistance of the formed oxide film are insufficient.

For the above-mentioned reasons, in the conventional technology, the Ti of the organic polymer material used for general electric appliances has not been damaged by deformation or deterioration.
It was practically difficult to form a photocatalyst thin film containing O ₂ as a main component.

A first object of the present invention is to provide an article having an antibacterial, antifouling and deodorizing effect in which a highly active photocatalyst is formed on the surface of a material having poor heat resistance, such as plastic or paint. It is in.

On the other hand, there is no mention in the invention of the above-mentioned photocatalyst application technique about a device for enhancing the organic substance decomposing effect of the photocatalyst containing TiO ₂ as a main component. That is, Ti
No contrivance has been made on the material composition for improving the photoactivity of the film containing O ₂ . Therefore, for example, in the case of the conventionally known utilization method for deodorization, which is disclosed in JP-A-8-309148 or JP-A-8-266605, or in the case of decomposing stains caused by cigarette tar or the like. In the case of Japanese Patent Application Laid-Open No. 9-38189, which is a method, or in an application example of decomposing dirt such as oil during cooking, Japanese Patent Application Laid-Open No. 5-157305
In each of the above publications, since the photocatalyst itself is not sufficiently active, the decomposition reaction is enhanced by installing a mechanism for irradiating ultraviolet rays, a heating means, and the like.

These are TiO ₂ when the light intensity is low.
The main reason is that the organic substance decomposition rate itself is not sufficient, and no measures have been taken to increase it. Therefore, an ultraviolet lamp or the like is used together as a means for increasing the light intensity. As the ultraviolet lamp, a high-pressure mercury lamp or a metal halide lamp is usually used, but a mechanism such as a power supply device and a cooling mechanism is required, which leads to an increase in weight and price of the applied product as a whole. Further, the life of the lamp is about 2000 hours, and regular replacement work is required, which is a problem in practicality.

In the prior art, there is known a technique for increasing the decomposition efficiency by adding Fe, V to TiO ₂ , but high temperature treatment at several hundreds of degrees Celsius has made it high performance, and it has low melting point and heat resistance. It is difficult to apply to poor substrate materials.

A second object of the present invention is to improve the photodecomposition efficiency of a photocatalyst film which can be formed at a low temperature, which is the first object, by increasing the TiO ₂
It is intended to improve the decomposition efficiency of a single substance so that the adhered substance can be decomposed with a light intensity lower than that conventionally required.

Further, in the prior art, in applications such as antibacterial properties, deodorization, and deodorization, the target substance is an organic substance, and since the target substance is fine particles or molecules, the adhered liquid organic substance or fine particles are used. Although the organic substances of the above could be decomposed, it is very difficult to decompose large size fibers and dust even if they are organic substances, or it is extremely difficult to decompose the inorganic substances such as dust. Yes, it was incomplete in the use of pollution prevention. Since these dirts are generally electrically charged and float in the air, if they adhere to the surface of a solid body with high electrical insulation, the static electricity will not be discharged easily and will remain as they are. I will end up. There is also a problem that the light is blocked by the adhered inorganic substance stains and the photocatalyst surface is not irradiated with sufficient light, which deteriorates the decomposition efficiency of organic substances.

A third object of the present invention is to cover large-sized dust particles and inorganic contaminants, which are difficult to decompose and remove by the oxidative decomposition effect of these photocatalysts, by electrostatic force. It's about not doing so.

[0029]

To achieve the above object, the features of the present invention are an air cleaner, a ventilation fan,
Among the components of electrical products mainly used indoors, which have a mechanism for generating an air flow by driving an electric blower such as a fan, a vacuum cleaner, a clothes dryer, a dish dryer, a dishwasher, and a garbage processor. The low-temperature curable high-activity oxide photocatalyst thin film is provided on the surface of the air flow path, the filtering mechanism in the air flow path, or the exterior parts exposed to the indoor illumination light.

The melting point or decomposition temperature of the material of the target component is 300 ° C. or less, and particularly for a molding member made of general-purpose thermoplastic plastic, a fiber member, a foam member, and a sheet-shaped member, low temperature curing By providing the high-activity oxide photocatalyst thin film, the problems such as pollution, microbial propagation, and generation of malodor, which are conventional problems, can be solved.

In the present invention, the film thickness of the oxide photocatalyst mainly composed of TiO ₂ is optimized, the particle size of TiO ₂ is optimized, suitable ions having low electronegativity are added, and SiO ₂ is used as a binder. In this case, the thin film with improved activity of photocatalytic reaction is prepared by the compounding formulation such as optimization of the mixing ratio with TiO ₂ , addition of oxide semiconductor having high electric affinity, addition of appropriate noble metals. By forming it on the surface of the air flow path or the exterior parts, it is possible to obtain the effects of stain prevention, deodorization, and microbial growth suppression at the indoor light level, which were not possible conventionally. Further, by stacking the films, it is possible to prevent damage to the organic base which is vulnerable to oxidative decomposition.

At the same time, in the present invention, during the step of forming a thin film of an inorganic polymer mainly composed of SiO ₂ or TiO ₂ ,
Polymerization of inorganic polymers can be performed at low temperature by incorporating a step of irradiating an electromagnetic wave containing a specific wavelength necessary to break the bond between the metal atom of the organometallic compound and the organic group to accelerate the hydrolysis reaction. Because
Even on the surface of a general-purpose thermoplastic having low heat resistance as described above, a strong oxide photocatalytic thin film strength can be obtained at a low temperature such that deformation, melting, or decomposition does not occur.

The details of the low temperature curable high activity oxide photocatalyst thin film will be described below. In the oxide photocatalyst thin film in which TiO ₂ fine particles which are the oxide photocatalyst are dispersed,
Electronegativity is less than 1.6 and ionic radius is 0.2n
It is an element smaller than m 2, and the reaction efficiency is improved by adding an ion having a valence of 2 or less. Specific elements to be added are Na, Li, K, S
r, Mg, Ca, and Zn are particularly effective, and the addition amount of these elements is preferably 0.5 to 20 wt%. Ti
It is most effective to adjust the size of the O ₂ fine particles to 5 to 20 nm.

In the oxide photocatalyst thin film in which TiO ₂ fine particles are dispersed in SiO ₂ , TiO ₂ / SiO ₂
It is preferred that the weight ratio of ₂ is 9-5.

The oxide thin film has a thickness of 100 to 500 n.
It is desirable that it is m.

If the components to be added are in addition to the above-mentioned ions, and oxide fine particles mainly composed of an oxide semiconductor composed of a metal element having an electron affinity of 1.2 or more are dispersed, the effect is further enhanced. . In particular, the elements are Sn, Fe,
Those made of Cr are preferable. The addition amount is 2 to 50
wt% is preferred. Above all, oxide fine particles mainly composed of ATO (antimony-added tin oxide) are particularly effective.
When these semiconductive fine particles are added, the surface resistance value of the film itself is lowered, and thus the dirt itself, including inorganic dirt that cannot be oxidized and decomposed, is less likely to be electrostatically attached.

Further, it is effective that the oxide photocatalyst thin film has a plurality of laminated structures. The first layer counting from the surface has TiO ₂ fine particles dispersed in SiO ₂ , and the above-mentioned ions are contained in the film. The second layer, which has been added and is counted from the surface, has the oxide fine particles mainly containing the oxide semiconductor dispersed therein. This allows the photocatalyst to function effectively without damaging the surface of plastic or the like, which has low durability against oxidation. Further, Fe and A are contained in the second layer.
It is more effective if at least one of l and Zr is added.

In addition to the above-mentioned ions, additional components
It is effective to add at least one of Pt, Rh, Pd, Ag, Cu and Ni.

TiO ₂ has a function as a photocatalyst, and has functions of antibacterial, deodorant, antifouling, etc. by decomposition of organic substances. Its function is due to electrons and holes generated when TiO ₂ which is a semiconductor is irradiated with light, especially ultraviolet rays. TiO _2, which is a semiconductor, produces electrons and holes when irradiated with light having energy higher than the band gap. The generated electrons and holes decompose water adsorbed on the TiO ₂ surface to generate H radicals and OH radicals. By reacting the OH radical with an organic substance, the organic substance can be decomposed. Although the photocatalyst decomposes organic substances and the like by such a mechanism, there are the following two means for further increasing the reaction rate. The first is to increase the work of one active point, and the second is to increase the number of active points. The number of active sites can be increased by increasing the surface area, that is, by atomizing TiO ₂ . Also,
In order to increase the work of the active sites, it is necessary to improve the crystallization of TiO ₂ (anatase) and prevent recombination of electrons and holes. By satisfying the above, the reaction rate can be increased. However, improving the crystallization of TiO ₂ (anatase) and increasing the surface area are contradictory, and it is difficult to achieve both at the same time. That is, improving the crystallinity leads to an increase in the particle size, resulting in a decrease in the surface area. Therefore, there is an optimum region between the direction of improving the crystallinity and the direction of increasing the surface area. The optimum region is 5 to 5 according to many experimental results of the present invention.
It was found to be 20 nm. Even when the kind of the oxide used as the inorganic binder when dispersing the TiO ₂ fine particles was changed, the decomposition rate increased in this particle size range.

The reaction rate can be improved by preventing the recombination of electrons and holes by increasing the separation efficiency of electrons and holes. Ti on the TiO ₂ surface
There are defects. This defect serves as a recombination point of electrons and holes and hinders the reaction. When ions with an ionic radius of about the same as Ti are added here, they penetrate into Ti defects on the surface,
Defects disappear and recombination points decrease. Furthermore, since it exists as positive ions, electrons can be attracted and separated from the holes, and the oxidation reaction of organic substances can be promoted. In the present invention, the condition of the additive having such an effect is that the electronegativity is 1.6.
It has been found that smaller ones and ionic radii smaller than 0.2 nm are effective.

Further, it has been found that the present invention can be improved in performance by adding other oxide semiconductor fine particles. This is achieved by injecting carriers into TiO ₂ having a low carrier concentration from an oxide semiconductor having a high carrier concentration. Therefore, it is necessary to make it easier for carriers to flow from the oxide semiconductor to TiO ₂ . When the electron affinity of the oxide semiconductor is Ti or less, a Schottky barrier is formed. Therefore, the added material has an electron affinity of 1.2e.
must be greater than or equal to v.

In the present invention, it was also found that the addition of Fe, Al and Zr causes the loss of the TiO ₂ photocatalyst. When a substrate material mainly composed of an organic substance is used, there is a problem that the substrate is self-destructed by a photocatalytic action. Therefore, in the present invention, a barrier layer is formed between the substrate and the photocatalyst. By adding Fe, Al, and Zr to this barrier layer, self-destruction can be completely suppressed. Furthermore, since it is a high-performance barrier layer, the film thickness can be made sufficiently thin. When conductive particles such as ATO are added or laminated, the performance of the photocatalyst is improved and the antistatic function is added, so that not only the decomposition of organic substances but also the dust floating in the air etc. It is possible to prevent the adhesion of the inorganic substances and provide a higher performance antifouling function. Further, the present invention has high activity as described above, can be decomposed with weaker light intensity than conventional ones, or has an antistatic function. Although the thin film of highly active photocatalyst has low cost and high versatility, it has been made possible to form a film on the surface of a material having insufficient heat resistance by the conventional film forming method.

To this end, titanium and silicon are included,
When a solution containing a low molecular weight organometallic compound and water is converted into an inorganic polymer and polymerized, an electromagnetic wave having a specific wavelength necessary for breaking the bond between the metal atom of the organometallic compound and the organic group is generated. By including the irradiation step, the hydrolysis reaction of the organometallic compound is promoted, the prepolymer of the metal oxide is formed in the solution, and the film formation temperature can be lowered. The electromagnetic wave of the specific wavelength is most preferably ultraviolet light. A solution containing a low molecular weight organometallic compound and water is applied to the surface of the adherend, and then a specific wavelength necessary for breaking the bond between the metal atom and the organic group of the organometallic compound such as ultraviolet light is applied. It is most desirable to irradiate the electromagnetic wave and heat-dry at the same time, or heat-dry the coating film after the electromagnetic wave irradiation step.

[0044]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of the present invention will be described below with reference to FIGS.

Tables 1 to 9 show the contents of the composition of the thin film of the low temperature curable high activity oxide photocatalyst formed on the surface of various molded products, coated steel plates, filters and the like and the effects of the examples. (Embodiment 1) First embodiment of the present invention with reference to FIGS. 1, 2 and 3.
An air purifier, which is an example, will be described.

FIG. 1 is a configuration diagram of a filter type air cleaner body, and FIG. 2 is a perspective view of the body. The air purifier body 1 is
The capacitor motor 7 is fixed to the rear cover 12 with the screw 8, the motor driving capacitor 11 and the operation switch 9 are fixed, the fan 6 is fixed to the capacitor motor 7 with the nut 5, and the rear cover 12 and the frame 4 are fixed with the screw 13. It is fixed. Further, the filter 3 is a panel (suction port) 2
Fixed to, filter (suction port) 2 removed, filter 3
Take out. The switch knob 10 is fixed to the operation switch 9.

The fan 6 is rotated by the driving force of the condenser motor 7 to generate an air flow. Due to this air flow, dirty air in the room containing dust, smoke, oil particles, microorganisms, dead bodies of microorganisms, pollens, and a foul odor is sucked from the panel (suction port) 2. The inhaled dirty air is filtered by the filter 3 part and cleaned,
It is discharged from the exhaust port 15 of the grill 14 part. The filter 3 part has a composite structure in order to have a function of removing various stains and odors. The filter 3 is composed of an outer filter 3a, which is a layer covering the outer surface, and an inner filter 3b inside the outer filter 3a (not shown). The basic structure of each filter is a non-woven fabric layer such as polyester, urethane, cellulose, nylon, or electretized polyolefins or a sponge-like porous layer for filtering dusts. In addition to these basic structures, the inner filter 3b is mixed, mixed-spun, or sealed with activated carbon particles or fibers for absorbing odors. In addition, an agent for neutralizing odor may penetrate into the fiber itself or spread on the surface. As the drug, in addition to various organic acids and flavonoid alkaloids, antibacterial agents for suppressing the growth of microorganisms are also used. In recent years, highly safe chitin, chitosans, catechin derivatives, etc. have also been used. The generated air volume is about 2 to 3 (m ³ / min),
It has the ability to remove 70 to 95% of cigarette smoke in a room of 8 tatami mats for 30 minutes of operation.

In the present embodiment, the outer filter 3a is made of a non-woven fabric of acrylic fiber, and the surface of the outer filter 3a is described in Table 3 below.
The thin film of low-temperature curing type high activity oxide photocatalyst of sample No. 21 shown in FIG. The acrylic non-woven fabric filter has a thin film of SiO ₂ only, that is, sample No. 12 of Table 1 is formed as an underlayer after the corona discharge treatment, and after forming this film, the low-temperature curing type high activity of sample No. 21 is obtained. A thin film of oxide photocatalyst is formed. The method for forming the film will be described in detail in Example 9 below,
After adjusting a predetermined sol and coating the work by various methods, the work was cured in an atmosphere of 120 ° C. while being irradiated with a low pressure mercury lamp. Films were formed by the same means in the following examples. The application method was spraying, dipping, brushing, or the like, depending on the shape of the work.

The outer filter 3a is a part for first filtering dirty air taken in from the panel (suction port) 2,
A large amount of dust, smoke, oil particles, various foreign substances such as microorganisms, corpses of microorganisms, pollens and malodors adhere. The panel (suction port) 2 is provided with a large number of openings for efficiently sucking air, and the air suction surface of the outer filter 3a receives light such as indoor lighting or sunlight from the openings. Is irradiated. The light oxidizes and decomposes the foreign matter collected on the surface of the outer filter 3a. In particular, cigarette smoke and oil particles are efficiently decomposed because they adhere to the low-temperature curable high-activity oxide photocatalyst on the filter surface in a thin film form. In addition, various microorganisms such as bacteria and mold floating in the air are killed or suppressed to reproduce due to the decomposition action of the highly active photocatalyst. Further, by covering the fiber surface of the non-woven filter with the glassy film, the wettability with smoke particles is improved and the smoke collecting effect is also improved.

Further, the panel (suction port) 2, the frame 4, the operation switch 9, and the rear cover 12 which are the exterior parts of the main body of the air purifier 1 are made of thermoplastic plastic AB.
It is an injection molded product of S. A low temperature curing type high activity oxide photocatalyst thin film is formed on the outer surface of these components.

In the present example, a schematic view of a thin film on the surface of these acrylic non-woven fabric filter samples shown in Table 6 to be described later on the surfaces of these ABS parts is shown in FIG. The plastic adherend 189 is an acrylic fiber here, and the low temperature curing type high activity oxide photocatalyst thin film is composed of a surface first layer 194 and a surface second layer 192, both of which are formed of TiO _{2 in the} SiO ₂ film 186. _{2 The} fine particles 187 and lithium 190 are dispersed, and the surface second layer 192
The antimony-added tin oxide fine particles 193 are dispersed therein.

A thin film of a low-temperature curing type high activity oxide photocatalyst of No. 86 is formed. In the acrylic non-woven fabric filter, the first layer is formed after the corona discharge treatment, and after forming this film, the second layer of the low temperature curable high activity oxide photocatalyst containing ATO of sample No. 86 is formed. .

Light such as indoor lighting or sunlight is applied to these exterior parts. Therefore, even if various kinds of foreign matters are attached, they are oxidized and decomposed as in the case of the filter.

FIG. 3 shows a sectional view of an electrostatic dust collecting type air cleaner. The whole is composed of a front cover 16 and a rear cover 17. Front cover 16, panel 18
The intake port 19 and the exhaust port 20 are provided in the
In the ventilation path connecting the intake port 19 and the exhaust port 20, there is a detachable prefilter 21. Behind the dust collecting electrode 22
The discharge electrode 23 is provided to face each other, and the dust collecting electrode 22 and the ozone removing filter 24 for removing ozone generated from the discharge electrode 23 are provided. The pre-filter 21, the dust collecting electrode 22, and the discharge electrode 23 are provided. There is a dust collection unit in which the ozone removal filter 24 is attached to the frame 25.
Further to the rear, the cushioning material 2 is provided at the contact portion with the dust collecting unit.
6, a duct 28 connecting the blower 27 and the dust collecting unit,
There is also a blower 27, the cushioning material 26 is attached to the duct 28, and the duct 28 is attached to the blower 27, and there is a blower unit configured in the same body. The purified air is exhausted from the exhaust port 20.

The pre-filter 21 plays the same role as the outer filter 3a in the case of a filter type air cleaner.

In this embodiment, the pre-filter 21 is a nylon net, and a thin film of a low-temperature curable high-activity oxide photocatalyst of sample No. 21 shown in Table 3 described later is formed on the surface of the net. . On the nylon net, a thin film of low-temperature-curable high-activity oxide photocatalyst of Sample No. 21 is formed after the ultraviolet irradiation treatment. A schematic view of the thin film on the surface of the nylon net is shown in a sectional view in FIG. The plastic adherend 189 is nylon fiber here, and the low temperature curable high activity oxide photocatalyst thin film 191 is made of Si.
TiO ₂ particles 187 and lithium 19 are contained in the O ₂ film 186.
0 is dispersed.

The rear cover 17 is an ABS injection-molded product, the front cover 16 is a galvanized steel plate that is plastically processed, and the outer surface is coated with a polyester-based baking paint. On the outer surfaces of the rear cover 17 and the front cover 16, a low temperature curing type high activity oxide photocatalyst thin film of Sample No. 86 is formed as described above. (Embodiment 2) A ventilation fan according to a second embodiment of the present invention will be described with reference to FIG.

FIG. 4 is a sectional view of the structure of the kitchen ventilation fan as seen from the side. An electric motor 30 is attached to the box-shaped frame 29, and blades 31 are attached to the electric motor 30. A shutter 32 is attached to the outdoor side (exhaust side) of the frame 29, and an orifice 33 is attached to the indoor side (intake side) of the frame 29. A lighting fixture 35 with a fluorescent tube 34 is attached to the upper portion of the orifice 33 on the indoor side (intake side). A filter 36 is attached to the indoor side (intake side) of the orifice 33 and the lighting fixture 35. An oil pocket 37 is provided below the filter 36.
There is.

The ventilation capacity is about 800 to 1000 (m ³ / hour) when the diameter of the blade 31 is 25 (cm).

The structure shown in FIG. 4 shows a ventilation fan for kitchen specifications, but the basic structure is the same for general indoors, toilets, bathrooms, etc., only with a slight difference in the mounting angle and the positional relationship of parts. is there.

As in the case of the air purifier described above, the structure of the filter 36 can be made a composite structure according to various uses to impart a deodorizing function and an antibacterial function.

In the present embodiment, the filter 36 is a single layer filter made of a non-woven fabric of acrylic fiber, and a thin film of low temperature curing type high activity oxide photocatalyst of sample No. 22 shown in Table 3 is formed on the surface thereof. ing. The acrylic non-woven fabric filter is made of SiO ₂ after corona discharge treatment.
Only a thin film, that is, Sample No. 12 in Table 1 was formed as the underlayer, and after forming this film, Sample N.
A thin film of a low temperature curing type high activity oxide photocatalyst of o.22 is formed.

The frame 29 is an injection molded product of PS (high impact styrene resin), and has an orifice 33,
The vane 31 is an ABS injection-molded product. On the surface of these molded parts, a low temperature curing type high activity oxide photocatalyst thin film of sample No. 86 was formed similarly to the above air cleaner.

The shutter 32, which is a component that faces the outdoors
Is made of cold-rolled steel sheet that has been subjected to hot dip galvanizing treatment, and the surface thereof is electrodeposited with an acrylic resin, and the surface thereof is coated with the low temperature curing type highly active oxide photocatalytic thin film of Sample No. 86 as described above. Has been formed.

The indoor surface of the filter 36 is illuminated with light from indoor lighting, and the opposite surface is illuminated with light emitted from the lighting fixture 35. Also, the frame 29 and the orifice 3
The light emitted from the lighting fixture 35 is also applied to the components such as 3, the blade 31, the oil pocket 37, and the like. The surface of the shutter 8 facing the outside is irradiated with sunlight.

In the case of the present embodiment, since it is a ventilation fan used in the kitchen, the degree of contamination is very large as compared with a normal ventilation fan. That is, a large amount of fine particles of edible oil scattered during cooking adhere to the surface in large amounts. In the case of a ventilation fan for the kitchen,
Conventionally, a lighting fixture 35 is generally provided. This is a function provided to illuminate the hand when cooking,
It is possible to turn on the light in synchronization with the operation of the ventilation fan, or to turn on only the lighting function independently. Since the organic catalyst decomposition efficiency of the photocatalyst according to the present invention is higher than that of the conventional one, in the case of a usual small amount of fouling load, a sufficient decomposition action can be obtained at the level of indoor lighting without installing a lighting fixture, but in the kitchen. It may be insufficient when used in a place with a heavy dirt load such as. However, if an ordinary fluorescent lamp or an incandescent lamp is provided as an illumination function as in the present embodiment, a sufficient effect can be obtained even in a place with a large dirt load such as a kitchen or a toilet.

(Embodiment 3) A fan according to a third embodiment of the present invention will be described with reference to FIG.

FIG. 5 is a perspective view showing the structure of the fan. A pillar 39 is attached on the fan main body base 38, and a slide pipe 40 is slidably inserted on the pillar 39. The slide pipe 40 supports a head portion 44 composed of a blade 41, a guard 42, an electric motor 43 and the like on the upper side. The column 39 is formed by increasing its diameter downward in consideration of strength. The blades 41 are rotated by the driving force of the electric motor 43, and an airflow is generated forward from the rear surface of the main body. The guard 42 plays a role of preventing the finger or the like from coming into contact with the rotating blade 41, but in order to prevent an accident such as a child, the guard 42 is further enhanced.
The whole 2 may be covered with a net 45 (not shown). A remote controller holder 46 is attached to the lower part of the support column 39, and the remote controller 47 is normally housed in the remote controller holder 46. When the operation mode is set by the switch operation of the remote controller 47, an infrared signal is transmitted from the infrared light emitting section 48 of the remote controller 47, and the infrared light receiving section 49 on the upper surface of the main body base section 38 receives the signal to perform the setting operation.

In this embodiment, the blade 41 is an AS resin injection molded product. On the surface of the blade 41, the low temperature curing type high activity oxide photocatalyst thin film of sample No. 86 is formed as in the case of the molded article such as ABS.

The guard 42 is made of a steel wire rod coated with a polyester-based baking finish, and the surface thereof is also sample N.
A low temperature curing type high activity oxide photocatalyst thin film of o.86 is formed. The net 45 is made of nylon fiber, and the low temperature curing type high activity oxide photocatalyst thin film of sample No. 86 is formed on this surface.

Further, the infrared ray emitting section 48 of the remote controller 47,
In addition, the infrared ray receiving portion 49 on the upper surface of the main body base portion 38 is made of AS resin which is a transparent member.

A thin film of low-temperature curing type high activity oxide photocatalyst of sample No. 86 is formed on the surface and the surface of these transparent parts. After forming a film of a titanate-based coupling agent on the surface of the target component, the first layer is formed. After forming this film, the AT of sample No. 86 is formed.
A second layer of a low temperature curable high activity oxide photocatalyst containing O is formed.

The surfaces of the blades 41, the guards 42, and the like are made to adhere to and become contaminated by foreign matter floating in the air in the same manner as the blades and frames of the air purifiers and ventilation fans described above. Since the film of the low-temperature-curable high-activity oxide photocatalyst is formed, the adhered dirt is oxidized and decomposed at the illuminance level of the indoor illumination light, and the effect of making the dirt less likely to occur.

Further, in the present embodiment, a mechanism for remote control using infrared rays is used. The low temperature curing type high active oxidation is applied to the surface of the transparent parts used for the light emitting part and the light receiving part of the infrared signal. Since the photocatalytic thin film is formed, the signal communication is not hindered by the dirt adhering to the surface of the component.

In this embodiment, an example of a fan using propeller type blades is used, but a fan using sirocco type blades can also achieve the same effect with a completely similar configuration.

(Embodiment 4) A vacuum cleaner according to a fourth embodiment of the present invention will be described with reference to FIGS.

FIG. 6 is a perspective view of the appearance of the cleaner, and FIG. 7 is a sectional view of the cleaner body. The cleaner body 50 includes a lower cover 51 of a synthetic resin molded product that covers a lower portion, an upper cover 52 that covers an upper portion, a lid cover 53, a grill cover 54, a handle portion 55, and the like. A large-diameter rear wheel 56 and a small-diameter free wheel 57 are arranged at the center of the bottom surface of the lower front part. A main body switch portion 58 is provided in the central portion of the upper cover 52, and the main body switch portion 58 is composed of a central infrared light receiving portion 59, a power switch 60 and a cord reel button 61. A suction hose assembly 66 including a suction hose portion 63, an extension pipe portion 64 and a suction portion 65 is connected to the dust collecting chamber 62. A handle portion 67 is connected to the upper portion of the extension pipe portion 64, and a hand operation portion 68 is attached to the handle portion 67. The hand operation unit 68 is provided with an infrared signal transmitting unit 69, and the infrared signal transmitted from the infrared signal transmitting unit 69 is transmitted to the infrared light receiving unit 59 of the cleaner body 50 wirelessly. Operated. Vacuum cleaner body 5
In No. 0, a dust collection chamber 62 is provided in the front of the inside, an electric blower unit 70 and a cord reel unit 71 are provided side by side in the rear of the inside, and a control board 72 is provided above the electric blower unit 70 and the cord reel unit 71. There is.

Further, behind the electric blower unit 70, there is formed a first exhaust ventilation passage 73 extending vertically from the lower end to the upper end of the rear surface of the cleaner body 50, and the first exhaust ventilation passage 73 is formed. Further, the lower end of is connected to the second exhaust ventilation passage 74 formed in the lower portion of the electric blower unit 70. The first exhaust ventilation passage 73 and the second exhaust ventilation passage 74 constitute an exhaust ventilation passage 75 (not shown), and the second exhaust ventilation passage 74 is communicated with the electric blower unit 70 to generate the first exhaust ventilation. The ventilation passage 73 communicates with the exhaust ventilation portion 76. Paper filter mounting parts 77 and 78 are provided on the upper part of the dust collecting chamber 62, and a thick paper of a paper filter 79 is mounted on the paper filter mounting parts 77 and 78 to cover the upper part of the dust collecting chamber 62.
By closing 3, the mounting port 80 and the paper filter 79
Are set in place. The universal wheel 57 is horizontally rotatably attached to a recess formed in the front bottom portion of the lower cover 51. The paper filter 79 collects dust, dust, mites, and microorganisms sucked together with the airflow from the mounting port 80.

The air stream from which these solid matters have been removed is separated by a partition plate 81 between the dust collection chamber 62 and the electric blower 70.
Communication port 83 provided with the auxiliary filter 82
Through the electric blower unit 70 to cool the electric blower unit 70, and the cooled air flow is further exhausted through the second exhaust ventilation passage 74 and the first exhaust ventilation passage 73. The air is exhausted from the exhaust ventilation part 76 provided with.

In this embodiment, the upper cover 52, the lid cover 53, the grill cover 54, and the handle portion 5 of the vacuum cleaner body.
5, the extension pipe portion 64, the suction portion 65, and the handle portion 67 of the mouthpiece hose assembly 66 are injection-molded products of ABS resin, and the surfaces of these molded products are sample No. 86 low-temperature curing type high-activity oxidation. A thin film of the photocatalyst is formed. After forming a film of a titanate-based coupling agent on the surface of the target component, a first layer is formed, and after forming this film, a low temperature curable high-activity oxide containing ATO of sample No. 86. A second layer of photocatalyst is formed.

Since the vacuum cleaner has a high mobility as compared with the articles according to the other embodiments, the surface of the exterior component is easily scratched. That is, the vacuum cleaner body and the mouthpiece often collide with furniture, wall surfaces, etc. while traveling on the floor surface, and scratches are gradually formed by this, resulting in a loss of gloss and appearance. Not only is it damaged, but the damage may cause damage such as cracking. In order to prevent this, a coating treatment with an ultraviolet curable acrylic resin or the like has been conventionally performed to secure the surface hardness. However, according to the present invention, TiO ₂ constituting a low temperature curable high activity oxide photocatalyst thin film or SiO used as a binder is formed.
The hardness of the film of ₂ is harder than ABS, and the pencil hardness is 2H to 4H.
Since it has a degree of hardness, when used for these exterior parts, it is possible to obtain the effect that scratches and the like are less likely to be scratched, and at the same time the original effects such as antifouling and microbial growth suppression. it can.

In particular, the handle portion 67 is a part that can be touched with bare hands. Bacteria easily proliferate with the adhered sweat and other body fats as nutrients, and conventional organic antibacterial agents such as imidazole and thiazoline, Inorganic antibacterial agents such as copper-based, zinc-based, and silver-based antibacterial agents were kneaded into the molding resin to obtain an antibacterial effect, but these treatments are not required.

Further, since the mouthpiece portion and the wheel portion are accompanied by sliding or rotating movements, it is easy to be charged with static electricity when a vacuum cleaner is used in a dry environment, and fibers such as carpets and dust are not included in the above parts. Often adheres to the surface. In order to prevent this, conventionally, various surfactants, and hydrophilic polymers such as polyamide and polyethylene glycol are kneaded in the molding resin to prevent the surface resistance from decreasing. However, according to the present invention, Since the resistance value of the low temperature curable high activity oxide photocatalyst thin film can be lowered, it is possible to obtain the effect of preventing the adhesion of dust and the like even with the molding resin of ABS having a high electric resistance value. A hand operation part 68 is attached to the handle part 67, and a control board on which electronic components are mounted is attached to the back of the hand operation part 68. May cause a malfunction of the control board, and the antistatic effect of the present invention is effective not only for preventing dust from adhering but also for preventing a malfunction of the control board.

Further, the infrared signal transmitting portion 69 provided on the same-side operation portion 68 and the infrared light receiving portion 59 of the cleaner body 1 are made of transparent AS resin as in the case of the fan of the third embodiment. Although it is made of a molded product, since a low temperature curing type high activity oxide photocatalyst thin film is formed on the surface, it is possible to obtain the effect of preventing the reception and transmission of infrared signals due to stains.

Further, the exhaust filter 84 attached to the exhaust ventilation part 76 of the main body is made of a mixed spun nonwoven fabric of acrylic and PP, and the surface of this exhaust filter 84 is a low temperature curing type highly active oxidation sample No. 21. A thin film of the photocatalyst is formed. The exhaust ventilation part 76 is provided with a large number of openings, and the air discharge surface of the exhaust filter 84 is irradiated with light such as indoor lighting and sunlight from the openings, so the surface of the filter is also cleaned. To be done.

Further, by making the upper cover 52 covering the upper part of the main body, the lid cover 53, the grill cover 54, the handle portion 55, and the like transparent parts, the outside light reaches the inside, and the dust collecting chamber 62. When the low temperature curing type high activity oxide photocatalyst thin film according to the present invention is formed on the filter fiber surface of the paper filter 79 and the auxiliary filter 82 inside, the antibacterial effect and the deodorizing effect can be obtained.

(Fifth Embodiment) A clothes dryer according to a fifth embodiment of the present invention will be described with reference to FIG.

FIG. 8 shows a sectional view of the main body of the clothes dryer.
85 is an outer frame, 86 is an opening / closing lid, 87 is a rotating drum, 88
Is a heat source, 89 is an exhaust port, 90 is a double-blade fan, 91 is a fan casing, 92 is a motor that serves as power, 93 is a belt that transmits the power of the motor 92 to the rotary drum 87, 9
4 is a round belt for transmitting the power of the motor 92 to the both-wing fan 90, 95 is a first airtight felt, 96 is a second airtight felt, 97 is a partition plate, and 98 is discharged from the fan casing 91. A circulation duct that guides the circulating air to the heat source 88, 99 is a lint filter device, 100 is an FD beam that fixes the fan casing 91 to the outer frame 85, 101 is a mounting ring that mounts a bearing 102, and the rotating drum 87 is The bearing 102 is rotatably slidably supported by the bearing 102. The rotating drum 87 is connected to the motor 92
Is transmitted through the belt 93 to rotate with the both-wing fan 90. By this rotation, the clothes are agitated and at the same time, circulating air (solid line arrow) is generated. When the circulating air passes through the heat source 88, it is heated and enters the rotating drum 87 to evaporate the water content of the clothes. And dry. After that, circulating air is sent to the heat source 88 through the circulation duct 98 by the double-blade fan 90 and is heated again to repeat drying of the clothes. Inside the opening / closing lid 86, a lighting fixture 104 with a fluorescent tube 103 is attached. A shock absorbing material 105 is attached along the inner peripheral surface of the rotary drum 87 to absorb impact. The cushioning material 105 is P
It consists of P foam.

In the present embodiment, the cushioning material 10 which is an inner surface part of the rotary drum 87 and which is irradiated with the light of the lighting equipment.
5, the parts such as the lint filter device 99 and the inner surface of the opening / closing lid 86 are made of ABS or PP resin, and the thin film of the low temperature curing type high activity oxide photocatalyst of sample No. 86 is formed on the surface thereof. After forming a film of a silane coupling agent on the surface of the target component, a first layer is formed, and after forming this film, a low temperature curing type high activity oxide photocatalyst containing ATO of Sample No. 86 is prepared. A second layer is formed.

The luminaire can be optionally turned on during the drying operation or as an independent operation irrespective of the drying operation, and when the light of the fluorescent tube 103 is irradiated, the adhered organic substances and Since the malodorous substances contained in the contacting air are effectively oxidized and decomposed, the effects of suppressing the growth of microorganisms and deodorizing are obtained.

Since the clothes are rotating during the drying operation,
Since the light does not reach evenly evenly, it is more effective to use an operation program for cleaning the inside of the rotating drum 87 by turning on the light for a certain period of time after the completion of the drying operation.

The outer frame 1 is made of a galvanized steel sheet, and the outer surface is powder-coated with epoxy resin. A low temperature curing type high activity oxide photocatalyst thin film containing ATO of sample No. 86 is formed on the surface of this coated surface.

The outer surface of the opening / closing lid 86 is made of a PS resin injection molded body, and the AT of sample No. 86 is also formed on this surface.
A low temperature curing type high activity oxide photocatalyst thin film containing O is formed.

The effect of the photocatalyst thin film on the outer surface of the outer frame 85 and the opening / closing lid 86 which are these exterior parts is the same as in the above-mentioned Examples
Similar to the case of the exterior part of 4, the effect of sufficient antifouling and antibacterial effects can be obtained by indoor light.

(Sixth Embodiment) A tableware dryer according to a sixth embodiment of the present invention will be described with reference to FIGS. 9, 10 and 11.

FIG. 9 shows an external perspective view of the tableware dryer.
FIG. 10 shows an enlarged cross-sectional view near the exhaust port 128. Figure 11
Shows a sectional view of the main body.

The inside of the main body 106 is vertically divided into a drying chamber 107 and an operation control chamber 108 by a partition plate 109. The operation control room 108 has a fan motor 110, a blower fan 111, a casing 112, and a heater 113.
Heating blower unit 1 for sending dry air consisting of
A controller 118 is disposed between the heating blower unit 114 and an intake port 117, which has an intake filter 116 connected to the drying chamber 107 by a duct 115. In addition, an upper basket 119 and a lower basket 120 for storing dishes are arranged above and below in the drying chamber 107. The lower car 120 has a movable rail 12 connected to a hinge 122 at a lower part of a door 121 so that the lower car 120 can be freely tilted.
5 is placed on the water tray 124 placed on top of it.
Similarly, the upper car 119 is also arranged on the movable rail 123. The movable rails 123 and 125 are arranged on a roller (not shown) rotatably provided on the side wall of the drying chamber 107 so as to be movable back and forth.
The lower car 120 is pulled from the drying chamber 107 by pulling 6 toward the front, and the upper car 1 is pulled by pulling the tip of the car.
19 can be pulled out. Panel 12
The exhaust port 128 provided on the No. 7 has a lattice shape and includes an exhaust filter 129. The partition plate 1 of the main body 106
09 is connected to the drying chamber 107 through an opening 130 and an exhaust duct 131. The temperature detector 132 is arranged in the exhaust duct 131, which is hardly affected by the outside air temperature.

The intake port 117 is an injection molded product made of PP, and the intake filter 116 is a net made of nylon, and the surface thereof has a sample No. 1 shown in Table 7 described later.
A thin film of low temperature curable high activity oxide photocatalyst of 91 is formed. After the nylon net is irradiated with ultraviolet rays, a thin film of a low-temperature curable high-activity oxide photocatalyst containing silver of sample No. 91 is formed.

The surface of the intake filter 116 is irradiated with indoor illumination light, so that the attached organic substances and the malodorous substances contained in the air are oxidized and decomposed. The exhaust port 128 and the exhaust filter 129 are similarly sample No. 91.
The low temperature curable high activity oxide photocatalyst thin film is formed. Moisture discharged around the air intake and exhaust ports tends to become moist due to dew condensation, and mold and bacteria may grow.
By using the photocatalyst having a high decomposition efficiency according to the present invention, it is possible to effectively suppress the growth of these microorganisms in indoor light. The formulation of Sample No. 91 is particularly suitable because the silver contained in the composition itself has an antibacterial action. In order to enhance the antibacterial effect, you may mix ceramic particles such as zeolite carrying a silver or apatite.

A lighting fixture 134 having a fluorescent tube 133 is attached inside the drying chamber 107. The lighting function can be utilized not only as an original function of lighting such as turning on the door 121 when the door 121 is opened and checking the degree of drying of the tableware inside, but also as a function of cleaning the inside of the drying chamber 107. That is, by forming the photocatalytic thin film on the surface of the internal parts of the drying chamber 107, the antibacterial and antifouling effect of the part irradiated with light can be obtained. In this embodiment, the upper car 119 and the lower car 120 are made by baking coating of a polyamide-based powder resin on an iron frame, and the surface of this coated surface is subjected to ultraviolet irradiation treatment, and then sample No. 92 is used. A thin film of a low temperature curable high activity oxide photocatalyst containing copper is formed. These upper and lower baskets are members that come into direct contact with tableware and are required to be clean, but the photocatalyst effect provides surface antifouling and microbial growth suppression effects, so keep them clean. Be done. Similar to silver, copper also has its own antibacterial effect, and therefore has an effect of increasing the antibacterial effect.

As in the case of the clothes dryer of the fifth embodiment, the dishes are shaded during the drying operation and the light does not reach evenly.
107 It is more effective to use an operation program that cleans the inside.

The door 121 is made of an ABS resin molded product, and a low temperature curing type high activity oxide photocatalytic thin film containing ATO of sample No. 86 is formed on the surface of the door 121. The effect of the photocatalytic thin film on the surface of the door 121 is that similar to the case of the exterior parts of Examples 1 to 5 described above, sufficient antifouling and antibacterial effects can be obtained with room light.

(Embodiment 7) FIGS. 12, 13 and 14
The dishwasher according to the seventh embodiment of the present invention will be described below.

FIG. 12 shows an external perspective view of the dishwasher,
13 and 14 show sectional views of the dishwasher.

A tableware storage tub 136 is arranged inside the outer frame 135, and a step 138 is provided at the lower part of the side wall of the tableware storage tub 136 provided with a door 137 for opening and closing the front opening thereof. A lower basket 139 for storing tableware is arranged in a removable manner. A pump 140 is arranged outside the bottom of the tableware storage tank 136. The pump 140 has a pump motor 141. Lower basket for storing dishes 13
A lower arm nozzle 142 that rotates immediately below 9 is arranged. A plurality of small holes 143 are provided on the upper surface of the lower arm nozzle 142. A venturi pipe 145 that sends the wash water sent from the pump 140 to the upper arm nozzle 144 is arranged in the tableware storing lower basket 139.
The upper arm nozzle 144 is provided with an upper basket 146 for storing dishes.
It rotates about the center as a fulcrum just below. Upper arm nozzle 1
A plurality of small holes 147 are provided on the upper surface of 44. A heater 148 is arranged on the bottom or back of the tableware storage tank 136. A heater cover 149 is arranged so as to enclose the heater 148. A water supply solenoid valve 150 is arranged on the outer surface of the tableware storage tank 136. An exhaust duct 151 is arranged above the outer surface of the tableware storage tank 136, and is connected to the exhaust port 152. Door 137
A control panel 153 is disposed on the upper part of the outer surface of the. A drainage pump 15 is provided outside the bottom of the tableware storage tank 136.
4 and the blower unit 155 are arranged.

During the cleaning operation, water is supplied from the water supply solenoid valve 150 to drive the pump 140 to supply pressure water to the lower arm nozzle 142 and at the same time energize the heater 148 to raise the water temperature. At the same time as the water is ejected from the hole 143, when it is sent to the upper arm nozzle 144 via the Venturi tube 145, the water is also ejected from the hole 147. In this way, the upper and lower arm nozzles evenly spray hot water onto the tableware in the tableware storage basket 146 to remove dirt. After the cleaning operation is completed, the drainage pump 154 is energized to discharge the dirty water, and the same operation as described above is repeated several times to rinse and remove the dirt inside. When the final rinsing operation is completed, the drying operation is started. The blower unit 155 is energized, the blower fan 156 is rotated, and passes through the blower duct 157 and the heater 148 arranged at the bottom of the tableware storage tank 136,
Air is supplied into the tableware storage tank 136. At this time heater 1
In 48, the energization is turned on / off for a certain period of time to make the cold air hot. With this warm air, water drops and residual water inside, and water drops adhering to tableware are converted into steam, and the exhaust duct 1
It passes through 51 and is discharged to the outside of the machine from the exhaust port 152.

In this embodiment, the exhaust port 152 is an ABS resin molded product, but the sample No.
A thin film of a low temperature curable high activity oxide photocatalyst containing 91 of silver is formed. Exhaust moisture around the exhaust port tends to be dewed to be in a damp state, and molds and bacteria may propagate, but if the photocatalyst with high decomposition efficiency according to the present invention is used, it can be effectively used in indoor light. It is possible to suppress the reproduction of microorganisms.

A lighting fixture 159 having a fluorescent tube 158 is attached inside the tableware storage tank 136. The lighting function can be utilized not only as an original function of lighting such as turning on when the door 137 is opened and checking the degree of washing and drying of the tableware inside, but also as a function of cleaning the inside of the tableware storage tank 136. That is, by forming the photocatalytic thin film on the surface of the internal parts of the tableware storage tank 136, the antibacterial and antifouling effect of the part irradiated with light can be obtained.

In this embodiment, the upper basket 146 for storing dishes is stored.
The lower basket 139 for storing dishes has a structure in which a polyamide-based powder resin is baked and coated on an iron frame, and the coating surface has a low-temperature curing high-activity oxide photocatalyst containing copper of sample No. 92. Thin film is formed.

These upper and lower baskets are members that come into direct contact with tableware and are required to be clean. However, the photocatalyst effect provides antifouling of the surface and the effect of suppressing the growth of microorganisms. Kept in.

Other members to which the light of the lighting fixture 159 is irradiated include the tableware storage tank 136 and the upper arm nozzle 14.
4, a lower arm nozzle 142, a Venturi tube 145, and the like. For these parts, PP resin injection molded products and SUS plastically deformed products are used. After the corona discharge treatment on the surface of these parts, a thin film of SiO ₂ only, that is, sample No. 12 in Table 1 is formed as an underlayer, and after this film is formed, low temperature curing type sample No. 21 is formed. A thin film of high activity oxide photocatalyst is formed.

By forming the photocatalytic thin film on the parts inside the dish storage tank 136 and attaching the lighting fixture 159, there is an effect unique to the dishwasher that the drying efficiency is improved. The effect is that TiO ₂ and SiO ₂ which are the basic materials of the low temperature curing type high activity oxide photocatalyst thin film according to the present invention are materials having good water wettability and, at the same time, are similar to fats and oils removed from soiled tableware. This is because even if a substance that repels water adheres, it is decomposed by the light of the lighting fixture 159, so that an effect of always maintaining high water wettability can be obtained.

As the operation of washing the dishes, the water temperature is raised to 60 to 70 ° C. during the final rinsing and the internal temperature is raised, and then the humidity is discharged to the outside by the blowing operation. The remaining water drops cause a decrease in drying efficiency. Since high water resistance is required for parts such as the tableware storage tank 136, the upper arm nozzle 144, the lower arm nozzle 142, and the Venturi tube 145, a hydrophobic material is often used and the surface is usually poor in water wettability. On the surface of a material having poor water wettability, water does not spread in a film-like wet state but adheres in the form of water drops having a high contact angle. Since a detergent containing a surfactant is added during the washing operation, the surface tension of the washing water is reduced and the contact angle is lowered, resulting in a well-wetted state, but the detergent components are not contained in the rinsing water during the final rinsing. It is rarely contained and the surface tension of water is very high. Therefore, at the end of the final rinsing, the rinsing water adheres to the surface of each component inside the tableware storage tank 136 in the form of innumerable water drops having a high contact angle.

These water droplets having a high contact angle have a large amount of water and do not dry easily as compared with the case of a water film spread in a thin film shape. Further, since water in the form of water drops is dried while being reduced in size while maintaining the shape of water drops, the surface area is also reduced and the drying speed is further slowed down, and the time required for drying is approximately three times as long. Tableware is made of glass and ceramics with good wettability,
There are many wooden pieces and they dry relatively quickly, but when the dishwasher itself ends with water droplets, when the door 137 is opened and the upper and lower dish storage baskets are pulled out, vibrations cause water droplets to drop on the dishes. However, a problem that wets the dried tableware occurs.

Tableware storage tank 136, upper arm nozzle 14
4, when the parts such as the lower arm nozzle 142 and the Venturi tube 145 are made of PP molded products, the residual water amount due to the adhered water droplets at the end of rinsing is about 30 g, whereas the photocatalytic film according to the present invention is formed. In this case, the residual water content is about 5
It was reduced to g. Further, the low temperature curing type high activity oxide photocatalyst thin film according to the present invention has high photoactivity and has a function of decomposing oils and fats adhered by the light of the luminaire 159, so that water wettability due to the adhesion of oils and fats does not decrease.

As in the case of the tableware dryer of the sixth embodiment, since the tableware is shaded during the drying operation and the light does not reach evenly, the tableware storage tank 136 is lit for a certain period of time after the completion of the drying operation. It is more effective to use an operation program that cleans the inside.

Although the door 137 is made of a PP resin molded product, sample No. 12 is formed as a base layer on the surface of the door 137 after corona discharge treatment, and after this film is formed, sample No. 12 is formed. A thin film of the low temperature curing type high activity oxide photocatalyst of .21 is formed.

The effect of the photocatalytic thin film on the surface of the door 137 is the same as in the case of the exterior parts of Examples 1 to 6 described above.
It is possible to obtain sufficient antifouling and antibacterial effects with indoor light. In this embodiment, the stationary dishwasher is explained, but the effect of the photocatalytic thin film can be obtained in the same manner for the tabletop type. In the case of the tabletop type, since the room light is radiated to the front surface of the exterior component, it is effective to form the photocatalytic thin film on the side surface or the surface of the outer wall surface member of the ceiling portion.

(Embodiment 8) Referring to FIG. 15 and FIG. 16, a kitchen garbage processor as an eighth embodiment of the present invention will be described.

FIG. 15 shows a perspective view of the appearance of the kitchen garbage processor, and FIG. 16 shows a sectional view of the main body.

Inside the frame 160, there is a stirring blade 161 rotatably supported at the center, and the raw garbage inlet 1 is provided at the top.
A treatment tank 164 provided with 63 is arranged, and a culture substrate is contained therein.
Contains 165. The culture substrate 165 is, for example, chopped sawdust, rice husk, or rice straw whose main component is fibrin that is not easily decomposed by microorganisms such as lignin, and each grain is porous and has voids, and The particle size is complicated and large voids are formed between the particles.

Three stirring blades 161 are installed on the rotary shaft 166, and are supported by bearings 167 provided in the processing tank 164.
The end of the rotating shaft protruding to one side is connected to the drive motor 168 by a transmission means 169 such as a chain with an appropriate reduction ratio. An inner lid 17 is attached to the upper opening 170 of the processing tank 164.
1 is installed on the upper panel 172 to be openable and closable. Further, in the vicinity of the upper part of the processing tank 164, the ventilation fan 173,
An intake port 174 and an exhaust port 175 are provided, and a ventilation fan 173 is provided.
The rotation causes the decomposed gas and water generated in the processing tank 164 to be discharged to the outside of the machine through the exhaust port 175. Further, an appropriate mesh filter is arranged at each of the intake port 174 and the exhaust port 175.

Further, an opening / closing lid 176 of the intake port 174 is provided, and the intake port 174 is opened / closed by the reciprocating movement of the solenoid 177 attached to the frame 160. Further, the upper panel 172 is provided with an operation section 178 for operation, and the controller 179 operates by this operation to operate the garbage disposal.

After several months, the culture substrate 165 needs to be replaced because the voids are filled with decomposed products and the like, the void ratio is reduced, and the garbage cannot be treated. Therefore, the processing tank 1
A discharge port 180 and a discharge passage 181 are formed at the bottom of the 64, and the culture substrate 165 that has fallen into the discharge passage 181 can be taken out of the frame 160 by an operation of scraping out.

The air in the upper void portion of the culture substrate 165 of the treatment tank 164 contains a large amount of substances such as trimethylamine, methyl mercaptan, ammonia, and hydrogen sulfide, which have a large bad odor intensity, as decomposition gas together with moisture. Due to this strong offensive odor, the conventional garbage disposal cannot be installed in the kitchen, and when it is installed on the veranda part of an apartment house or the like, leakage of odor to the surrounding households poses a problem.

Conventionally, various deodorizing mechanisms using an adsorbent such as activated carbon and a manganese-based thermal decomposition catalyst have been devised as deodorizing mechanisms, but none of them are sufficient in terms of effect and life.

In this embodiment, exhaust filters 182 and 183 are provided at the exhaust port 175, and the ultraviolet lamp 184 is disposed in the gap between them. The exhaust filter 182 has zeolite as a main component and the exhaust filter 183 has active carbon as a main component, and each has a honeycomb structure, and the ultraviolet rays emitted from the ultraviolet lamp 184 irradiate the inside of the honeycomb. . On the inner surface of the honeycomb of the exhaust filters 182 and 183, the low temperature curing type high activity oxide photocatalyst thin film of sample No. 62 shown in Table 5 is formed.

The low-temperature curing type high activity oxide photocatalyst according to the present invention has a high decomposition efficiency, and in the application of relatively small organic load as in Examples 1 to 7, the indoor lighting equipment level, that is, the wavelength is 250-350 (nm) ultraviolet light has an illuminance of 0.001-0.01 mW / cm ² level, or 0.01-0.1 mW / due to the installation of fluorescent or incandescent lamps.
Decomposition was possible with an illuminance of the cm ² level, but in the case of a high load of several ppm level in the ammonia concentration as in this example, it is necessary to dispose an ultraviolet ray generation means.

Although an ultraviolet lamp such as a mercury lamp or a metal halide lamp can be used, according to the present invention,
Since the decomposition efficiency is higher than that of conventional oxide photocatalysts, the deodorizing effect is large, and the UV intensity is also smaller than when using conventional oxide photocatalysts. When the introduced garbage is most actively decomposed, the above-mentioned odorous substances are generated in the largest amount.

Decomposition of food waste is normally carried out from 1 hour to 8 hours after the introduction.
Since the time is the most active, the ultraviolet lamp 184 can be turned on at this timing to keep the life of the lamp long. The exhaust filter 183 is based on activated carbon. When the odor concentration is low, the exhaust filter 183 adsorbs the odor to the activated carbon, and the adsorption efficiency gradually decreases as the adsorption amount increases. Then, the absorbed malodorous substance can be decomposed to regenerate the activated carbon.

The frame 160 is made of a coated steel plate, and the outer lid 171 is made of an injection-molded product of PP resin. An organic coating film of chlorinated polyethylene is applied to this surface. A thin film of low-temperature curing type high activity oxide photocatalyst of sample No. 21 is formed on the surface.

The effect of the photocatalytic thin film on the surfaces of the outer frame 160 and the outer lid 171 is that the effect of sufficient antifouling and antibacterial effect in the room light can be obtained as in the case of the exterior parts of Examples 1 to 7 described above. Is what you get. Particularly in the case of the garbage disposal, since garbage is handled, the exterior parts are often contaminated with juice dripping from the garbage, so that the low temperature curing type highly active oxide photocatalyst thin film of the present invention has a great antifouling effect. When the kitchen garbage processor is placed outdoors, sunlight is applied to these exterior parts. The illuminance of UV light of the wavelength of sunlight 250-350 (nm) is 0.1-
It has a strength of 5.0 mW / cm ² compared to indoor lighting, and can decompose dirt such as raw garbage juice.

In the above-mentioned Examples 1 to 8, the adherend such as various thermoplastics is used for the passage of the air flow generated by the electric motor, the filtering mechanism such as the filter provided in the passage, or , A composition of a low temperature curing type high activity oxide photocatalyst thin film formed on the surface of exterior parts such as interior lighting that are irradiated with external light, or parts that are provided inside the device and that are irradiated with light emitted from a lighting fixture. In addition, the curing conditions of the film, the characteristics of each compounding composition, and the like will be described below in Examples 9 to.
This will be described using 16.

Example 9 A solution was prepared in which TiO ₂ fine particles were dispersed in SiO ₂ sol. PE using this solution
A TiO ₂ film was formed on the T film to produce the PET film shown in FIG. The procedure is shown below.

First, a method for producing a SiO ₂ sol will be described. 5 g of tetraethoxysilane in 100 ml of water-
It was dissolved in an ethanol-propanol (3:27:70) mixed solution and stirred at 40 ° C. for about 5 hours. The resulting solution was left at room temperature for 2 weeks to form a SiO ₂ sol.

Next, a method for preparing a solution in which TiO ₂ fine particles are dispersed in SiO ₂ sol will be described. S produced earlier
TiO ₂ fine particles in a weight ratio of TiO ₂ / Si in iO ₂ sol.
Added as O ₂ = 9. Also, the solid content concentration is 4 wt%
Then, the necessary amount of water was added to adjust. Then, using a zirconia ball having a diameter of 5 mm, the TiO ₂ fine particles were treated with a 24 hr ball mill to disperse the TiO ₂ particles in the SiO ₂ sol,
₂ A solution was prepared in which TiO ₂ particles were dispersed in a sol.

TiO ₂ prepared on PET film 185
Coated with SiO ₂ sol with fine particles dispersed, 120 ° C
Was irradiated with a low pressure mercury lamp (intensity: 15 mW / cm ² ) for 5 minutes to form a plastic film coated with a TiO ₂ dispersed SiO ₂ film 188 in which TiO ₂ fine particles 187 were dispersed in the SiO ₂ film 186. The thin film obtained on the PET film 185 had good film quality and strength, and the film thickness was 300 nm.

The decomposition activity of organic substances by this titanium oxide was evaluated. The activity test was carried out by coating the thin film with a red-purple organic dye and irradiating it with light of 1 (mW / cm ² ) at 254 nm. The decomposition rate was obtained from the amount of change from the initial transmittance of the dye. The results are shown in FIG.

For comparison, in the figure, the results of not having a TiO ₂ -dispersed SiO ₂ film, but having no film and SiO ₂ film are also shown. TiO
_There is almost no change in the amount of dye with the _2- dispersed SiO ₂ film and with the SiO ₂ film, but 3 with the TiO ₂ -dispersed SiO ₂ film.
The result was 45% decomposition after 0 minutes.

In this way, a TiO ₂ -dispersed SiO ₂ film-attached PET film having a photocatalytic function could be produced. The film forming method of the present invention can be manufactured at about 120 ° C. and can be applied to plastic materials other than Pyrex glass substrates. In the normal sol-gel method, 400 ℃
It is difficult to apply it to plastic products because it requires a certain temperature, and it takes 10 minutes or more to crystallize TiO ₂ . On the other hand, since the production method of the present invention can form a film at a low temperature, it has a wide variety of substrates that can be used, and a photocatalyst can be formed on any surface. In addition, the processing time can be shortened to a few minutes, and the production cost can be significantly reduced.

Next, a promoter was added to improve the performance of the photocatalyst. TiO in the previously prepared SiO ₂ sol
₂ Various nitrates were added to the solution in which the fine particles were dispersed to form a film on the PET film, and the decomposition reaction of the dye was performed. The results are shown in Table 1.

[0142]

[Table 1]

Na, Li, K, Mg, Ca, Sr, Zn
It was found that the added photocatalyst is effective and Fe and Al serve as deactivators.

FIG. 21 shows the results of plotting the effect of the addition of the promoter on the electronegativity. It seems that the smaller the electronegativity is, the more effective it is. However, since Li, Na, and Mg are particularly effective, it was found that not only the electronegativity but also the ionic radius is important. FIG. 22 shows the relationship between electronegativity, ionic radius, and addition effect. in this way,
Electronegativity is less than 1.6 and ionic radius is 0.2 nm
It has been found that it is effective to add ions of smaller elements having a valence of 2 or less.

Example 10 Several kinds of solutions were prepared in which TiO ₂ fine particles having different particle diameters were dispersed in SiO ₂ sol. The TiO ₂ / SiO ₂ ratio was 9 by weight, and Li
TiO ₂ was added in the same manner as in Example 1 with an addition amount of 5 wt%.
A dispersed SiO ₂ film was formed on a PET film, and the decomposition rate after 10 minutes was examined using an organic dye.

[0146]

[Table 2]

Table 2 shows the conditions and test results of the samples prepared. From these results, it was found that the dispersed TiO ₂ particles having a size of 8 to 10 nm are most effective. In this way, the decomposition rate changes depending on the particle size, and when the TiO ₂ / SiO ₂ ratio is further reduced, TiO ₂
The optimum particle size of the fine particles changed, but the decomposition rate was good in the range of 5 to 20 nm. Therefore, it was found that the TiO ₂ particle size of the Li-added catalyst should be 5 to 20 nm. Further, the above results show that Na, K, M other than Li
The same applies to g, Ca, Sr, and Zn.

Example 11 Table 3 shows the amount of Li added and TiO 2.
_The results of examining the dye decomposition rate and the film strength when ₂ / SiO ₂ was changed are shown. The production of the solution and the film formation method were the same as in Example 1. From these results, the condition that both the decomposition rate and the strength are effective is that the addition amount of Li is 0.5 to 20.
It was found that the TiO ₂ / SiO ₂ was 9 to 5 at wt%.

[0149]

[Table 3]

Table 4 shows the results of examining the dye decomposition rate and the film quality when TiO ₂ / SiO ₂ and the film thickness were changed. The solution was formed and the film formation method was performed in the same manner as in Example 1, but the film thickness was adjusted by changing the solid content concentration of the solution to 0.5 to 8 wt%.

As a result, it was found that when the film thickness is 300 to 500 nm, the decomposition rate and the film quality are good without being affected by the TiO ₂ / SiO ₂ ratio.

The above results show that other than Li, Na, K, Mg,
The same was true for Ca, Sr, and Zn.

[0153]

[Table 4]

Example 12 In Table 5, oxide semiconductors other than TiO ₂ , such as ATO, ITO, ZnO, Fe ₂ O ₃ ,
The results of examining the dye decomposition rate when Cr ₂ O ₃ fine particles are added are shown. As a result, the addition of ATO, Fe ₂ O ₃ and Cr ₂ O ₃ fine particles was effective, and the addition amount was effective in any case, and the addition amount of 10 to 20 wt% was most effective. Here, the electron affinities of the constituent elements of each oxide are as follows, and it has been found that it is effective to use an oxide semiconductor using a constituent element having an electron affinity of 1.2 eV or more.

[0155]

[Table 5]

Constituent Element Ti Sn In Zn Zn Fe Cr Electron Affinity (eV) 1.25 1.2 0.2 −1.2 3.16 3.54 When the electron affinity of the oxide semiconductor is smaller than that of Ti, a Schottky barrier is formed at the particle interface of the fine particles. , The added oxide semiconductor carriers cannot be injected into TiO ₂ and no effect is exhibited. On the other hand, when the electron affinity of the oxide semiconductor is smaller than that of Ti, a Schottky barrier is not formed at the particle interface of the fine particles and an ohmic contact is formed, so that the carrier of the oxide semiconductor easily becomes TiO ₂
It is injected inside and works effectively. AT was particularly effective
Although the electron affinity of O is slightly smaller than that of Ti, there is almost no difference between them and the performance is improved. This is because ATO, which is a conductive oxide, has a high carrier concentration, and a large amount of ATO carriers were injected into TiO ₂ to improve the activity of the photocatalyst. Further, it was also found that the effect of adding Li is great even when such an oxide semiconductor is added.

Further, as a method of effectively utilizing the carrier possessed by the oxide semiconductor, not only addition of fine particles but also lamination is possible. Table 6 shows TiO ₂ / SiO ₂
The result when the film and the ATO film are laminated is shown. As a result, it was found that stacking is effective, and further, by adding Li to both, the performance is further improved. It was also found that it is effective to stack a plurality of layers alternately.

[0158]

[Table 6]

(Example 13) Particle size 5 in SiO ₂ sol
A solution in which TiO ₂ fine particles of nm are dispersed was prepared, and ₂ wt% of Ag, Pt, Pd, Rh, Ni, Cu, and RuO ₂ fine particles were added to TiO ₂ , respectively. The TiO ₂ / SiO ₂ ratio was 9 by weight. Using the prepared Ag, RuO ₂ fine particle-added TiO ₂ -dispersed SiO ₂ sol, Ag, Pt, Pd, R were processed in the same manner as in Example 1.
A TiO ₂ -dispersed SiO ₂ film added with h, Ni, Cu, RuO ₂ fine particles was formed on a PET film, and the decomposition characteristics of the organic dye were examined. As shown in Table 7, the results are Ag, P
It was found that the addition rate of t, Pd, Rh, Ni, Cu, RuO ₂ particles increased the decomposition rate.

[0160]

[Table 7]

(Example 14) Regarding the Li-added photocatalyst and the Li-free photocatalyst produced in Example 1, decomposition characteristics of tobacco tar, acetoaldehyde, urea, and Escherichia coli using fluorescent lamps, sunlight, incandescent lamps, and mercury lamps. Were compared. As a result, as shown in Table 8, no matter which lamp was used for the Li-added photocatalyst, the decomposition characteristics of tobacco tar, acetaldehyde, urea, and Escherichia coli were 3 to 5 times more effective than the Li-free photocatalyst. Do you get it. As described above, it has been found that the Li-added catalyst can be sufficiently effective not only in the ultraviolet lamp but also in the lamp used in the living environment. Also,
Similar effects were obtained when Na, K, Mg, Ca, Sr, and Zn other than Li were added.

[0162]

[Table 8]

(Example 15) If the Li-added TiO ₂ -dispersed SiO ₂ film produced in Example 1 is directly formed on a PET film, the PET film as a base material is damaged by a photocatalytic action. Therefore, L produced in Example 9
When the i-added TiO ₂ -dispersed SiO ₂ film was coated, a film having one layer of SiO ₂ film provided between the film and the PET film was prepared. Further, a sample in which each nitrate of Al, Fe, and Zr, which is a component for deactivating the photocatalytic action in the SiO ₂ film was added, or a sample in which ATO was added in the Li-added TiO ₂ -dispersed SiO ₂ film was prepared, and various samples were prepared. The test was conducted. The results are shown in Table 9.

[0164]

[Table 9]

The results show that Li-added TiO ₂ -dispersed SiO ₂ film and P
By providing one SiO ₂ film as a barrier layer between the ET films, it was possible to prevent film peeling even after long-term use. Furthermore, it was found that the photocatalytic activity can be completely deactivated by adding Al, Fe, and Zr, and the adhesive strength can be maintained. Further, in the ATO-added film, the antistatic effect was added, the adhesion of dust and the like could be suppressed, and not only the decomposition of organic substances but also the adhesion of inorganic substances could be prevented, and a film having a more excellent antifouling effect could be produced. .

The low temperature curing type high activity oxide photocatalyst thin film having the composition shown in the above-mentioned Examples 9 to 16 was prepared as in Examples 1 to 1.
The results of evaluating specific effects when used in various articles having a mechanism for generating an air flow by an electric motor as shown in 8 are summarized below. First, the effects obtained when the low temperature curing type high activity oxide photocatalyst thin film according to the present invention is applied to a filtration mechanism provided in an air flow path will be summarized.

A typical airborne contaminant in a room is tobacco smoke. Cigarette smoke is particles of tar substances or soot suspended in the air. These particles form a film and accumulate on the filter, and the filter gradually becomes brown and becomes dirty. The smoke stains on this cigarette were evaluated.
A polyester fiber non-woven fabric filter having a target area of 10 cm × 10 cm was attached and fixed to the front side, which is the suction side, of a ventilation fan with an air flow rate of 5 (m ³ / min). This non-woven fabric ventilation fan was placed in a container having a capacity of 45,000 (cm ³ ) and sealed. A cigarette smoke generator was installed in the container. The cigarette smoke generator has a tube attached to the filter side of the lit cigarette, which tube is connected to a diaphragm pump. When this diaphragm pump is driven with an air flow of 1,800 (cm ³ / sec) and the tube end on the cigarette side is decompressed, the smoke that has passed through the cigarette filter is exhausted from the discharge side of the pump and it takes about 1.5 minutes. Burn a cigarette. When the cigarette smoke generator and the ventilation fan are driven in a container of such a configuration, the exhaust air of the ventilation fan is also discharged into the container, so the cigarette smoke filled in the container passes through the nonwoven fabric filter section many times. Will be done. 5
A cigarette of a book was continuously burned, a ventilation fan was driven for 10 minutes, the container was opened, and a non-woven fabric filter was removed to obtain a sample. The low temperature curing type high activity oxide photocatalyst thin film according to the present invention is formed on the fiber surface of this nonwoven fabric filter. The manufacturing method was the same as that described in Example 9. In Example 9, a PET film is used, but here, a non-woven fabric filter in which lithium nitrate is added to a solution in which TiO ₂ fine particles are dispersed in SiO ₂ sol and which is surface-oxidized in an ozone atmosphere is used. , Hold for 1 minute, pull up the filter,
After scattering unnecessary solution by air blow,
The photocatalytic thin film was formed on the fiber surface by treating the film for 5 minutes while irradiating it with a low pressure mercury lamp (intensity: 15 mW / cm ² ) at 0 ° C. The composition of this film is sample N in Table 1.
o.2.

The sample thus prepared was irradiated with light from a fluorescent lamp to evaluate the degree of decomposition of the adhered dirt. The evaluation is based on a color difference meter (Nippon Denshoku Industries Co .:
Z-1001DP). The color difference in the soiled state before light irradiation was set to 100%, and the stain resistance due to the smoke smoke was set to 0%, and the antifouling effect was evaluated. For comparison, sample No. 11 was obtained by only dispersing TiO ₂ fine particles in SiO ₂ , and sample No. 1 was obtained in the case of a film of SiO ₂ alone containing no TiO ₂ fine particles.
For 2 as well, a thin film was similarly formed on the surface of the filter fiber and evaluated.

The results are shown in FIGS. 23 and 24. FIG. 23
Is a result of evaluating the degree of dirt of the filter by color difference with time when a smoke passing test was conducted under the same conditions. Compared to untreated acrylic fiber, TiO ₂ and Si
When the glassy oxide photocatalyst thin film containing O ₂ as a component is attached, discoloration is accelerated by about 50%, that is, the smoke collection efficiency is improved by about 50%. FIG. 24 shows that the filter that has absorbed smoke under the above conditions and is discolored to brown is irradiated with the light of a fluorescent lamp to decompose the adhered substances by the photocatalyst, and the color of the discolored filter returns to the original color tone again. Is the result of evaluation by the measurement with time. The accumulated light quantity in the figure is 25
It represents the integrated value of irradiation with light having a wavelength of 0 to 350 (nm). Sample No. 12 in the figure is Si containing no TiO _2.
This is the case of only O ₂ , and almost no decolorizing effect due to decomposition is recognized. The sample No. 11 and the sample No. 2 contained the same amount of TiO ₂ , and the effects were observed, but the sample No. 2 was the formulation according to the present invention in which LiNO ₃ was added, and the decolorization rate was You can see that it has been greatly improved. In particular, in the initial stage, the decomposition efficiency which is more than twice as high as that in the case where LiNO _{3 is} not added is obtained. In the case of an actual air purifier or ventilation fan, since a small amount of dirt adheres to the room light at the same time, the initial decomposition speed is important. As the amount of dirt attached increases, the light is blocked by dirt and does not easily reach the photocatalytic thin film on the fiber surface, so that the decomposition efficiency also decreases. Therefore, it is important that the dirt is decomposed before it is thickly attached.

In the actual environment, in order to attach the same amount of dirt to the filter as in the main test using the above device, when the above ventilation fan was operated in a closed 6 tatami mat (about 20 m ² ). , 20 cigarettes were burned, which was equivalent to the amount of dirt after 120 minutes of operation.

Next, the results of studying the deodorizing effect when the low temperature curing type high activity oxide photocatalyst thin film according to the present invention is applied to the filtration mechanism provided in the air flow path will be summarized. As a typical malodorous substance, the effect of removing ammonia was evaluated. The study was conducted with the same configuration as that of the above cigarette. Instead of the cigarette smoke generator, a certain amount of ammonia gas is injected into the container, the ammonia gas concentration inside the container is adjusted to 25 (ppm), and then a low-temperature curable high-activity oxide photocatalytic thin film is formed. The ventilation fan with the attached non-woven fabric was driven. First, the result of measuring the adsorption effect of ammonia gas by the glassy oxide photocatalyst thin film is shown in FIG. 25 as in the case of smoke collection. In the case of untreated acrylic fiber, 90% (%) or more of the ammonia gas remains even after 1 hour, but when the glassy oxide photocatalytic thin film containing TiO ₂ or SiO ₂ is attached. It can be seen that was absorbed and removed to a concentration of 50 (%) or less after 1 hour. The effect of collecting not only smoke but also ammonia gas is recognized.

After adsorbing the ammonia gas until it was saturated, an incandescent lamp provided inside the container was turned on so that the filter surface was exposed to light. The ammonia gas concentration in the container was measured over time to evaluate the ammonia decomposing effect. The result is shown in FIG.

With the filter of Sample No. 12 containing no TiO ₂ , almost no change in concentration was observed. TiO
_It can be seen that No. 11 and No. ₂ containing ₂ decreased in ammonia gas concentration with light irradiation and were decomposed.
The decomposition efficiency was greatly improved by blending LiNO _{3 according} to the present invention, and the decomposition efficiency was about three times as high as that of Sample No. 11.

The antifouling and deodorizing effects as described above have been described as representative examples of application examples to air purifiers and ventilation fans, but the same effects can be exhibited by filters of various articles having the same mechanism. Needless to say.

Next, the results of evaluating the specific effects of various articles as shown in Examples 1 to 8 when used as exterior parts are summarized below. As a sample, a thermo-plasticizing ABS resin for injection molding (Technopolymer Co., Ltd .: Tflex 451, white colored product) most used for exterior parts was used. A 5 cm × 5 cm plate-shaped molded product was prepared, and the surface was subjected to corona discharge treatment. Example 1 was applied to this corona discharge treated surface.
A low temperature curing type high activity oxide photocatalyst thin film having the composition of sample No. 86 shown in Table 6 in Table 2 was formed. For comparison, sample No. 11 in Table 1 as a sample in which TiO ₂ fine particles are merely dispersed in SiO ₂ and sample No. 11 in the case of a film of SiO ₂ only that does not contain TiO ₂ fine particles are used.
Similarly, with respect to No. 12, a thin film was formed on the surface of the molded plate and evaluated. First, as in the above, the evaluation of the dirt caused by cigarette smoke was performed. The examination was performed with the same configuration as the above-mentioned test of the non-woven fabric filter. Fix a 5 cm x 5 cm ABS plate in the center of the part where the filter is placed, burn 10 cigarettes, and then drive the ventilation fan for 120 minutes to produce a white A
The BS plate was stained brown. The ABS plate was removed, light was irradiated under various conditions as before, and the removal rate was evaluated by measuring the color difference before and after the irradiation. The result is shown in FIG.

As a result, almost the same result as in the case of using the filter was obtained, but since the amount of dirt attached itself was less than in the case of using the filter, the same decolorizing effect was obtained with less than half the amount of light. Sample No. 86 contains LiNO ₃ and ATO as an additive component.
Compared with No. 11, a slightly higher decomposition efficiency was obtained.

Next, the results of evaluating the antifouling effect when the article is used in an environment where oil is heavily used, such as in a kitchen, and is soiled with oil and fat are summarized. On a 5 cm × 5 cm glass plate on which a low temperature curing type high activity oxide photocatalyst thin film having the composition of Sample No. 86 shown in Table 6 of Example 12 was formed,
Salad oil was thinly applied to a thickness of about 5 (μm), irradiated with light from an ultraviolet lamp, and the change in oil weight was measured over time.
The result is shown in FIG. As a result, almost no weight change was observed in sample No. 12 containing no TiO ₂ . No. 11 and No. ₂ containing TiO ₂ are reduced in weight due to oil decomposition and volatilization due to light irradiation, but No 2
With the addition of LiNO _{3 according} to the present invention, the decomposition efficiency was greatly improved, and the decomposition efficiency about twice that of sample No. 11 was obtained.

In forming the low temperature curing type high activity oxide photocatalyst thin film according to the present invention, including the case of the above series of examples, various methods are used to improve the adhesion to the underlying material. You can As a method of using a primer, for example, it is effective to form a photocatalytic film after applying various coupling agents in advance.

[0179] Examples include silane coupling agents and organic titanium compounds.

Examples of silane coupling agents are vinyltris (βmethoxyethoxy) silane, vinyltriethoxysilane, vinyltotimethoxysilane, γ- (methacryloxypropyl) trimethoxysilane, β (3,4).
Epoxycyclohexyl) ethyltrimethoxysilane,
γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, N-β
(Aminoethyl) γ-aminopropyltrimethoxysilane, n-β (aminoethyl) γ-aminopropylmethyldimethoxysilane, γ-aminopropyltriethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, γ-mercapto Propyltrimethoxysilane or the like can be used.

As the organic titanium compound, titanium ester, titanium acylate and titanium chelate can be used, and particularly tetra-i-propoxy titanium, tetra-n-butoxy titanium, tetrakis (2-ethylhexyloxy). Titanium, di-i-propoxy bis (acetylacetonato) titanium, titanium-i-propoxyoctylene glycolate, titanium stearate and the like are effective.

Further, the surface of the object is subjected to an oxidation treatment by using various surface modifying means to introduce a hydroxyl group, a carbonyl group, a carboxyl group or the like to firmly bond the low temperature curable high activity oxide photocatalyst thin film according to the present invention. The method is also effective.

Specifically, methods such as ultraviolet irradiation, electron beam irradiation, corona discharge treatment, ozone atmosphere treatment and the like can be mentioned. In the case of a relatively hydrophilic resin such as a polyamide resin or a polyester resin, a high adhesive force can be obtained without pretreatment as described above, but for a polyolefin resin or a highly crystalline resin, It is effective to perform these pretreatments.

As described above, in the present invention, it is effective to mix Ag or Cu as an additive component for enhancing the activity of the photocatalyst. At the same time, these reduce the electric insulation of the film itself, and thus, the antistatic effect is obtained, and further, the effect of suppressing microbial growth can be obtained.
It is known that the ions of Ag and Cu have high antibacterial properties, particularly high bacterial resistance, and when these Ag and Cu are used in combination, the growth of microorganisms can be suppressed even when not exposed to light.

The scope of application of the present invention is not limited to the apparatus described above by way of specific examples. That is, the principle of the present invention is to accelerate the polymerization of an inorganic polymer by irradiating electromagnetic waves having a specific wavelength such as ultraviolet rays, and as a result, even if the surface of a material having low heat resistance such as plastics is treated with TiO ₂ Taking advantage of the fact that an inorganic thin film of a photocatalyst containing TiO ₂ as a main component is formed and the reaction activity of the photocatalyst containing TiO ₂ as a main component is increased several times by adding various components, it can be used for general heat plasticizing. It has a photocatalytic function on the surface coated with plastics, thermosetting plastics, or plastic materials. By utilizing this principle, the surface of low heat-resistant materials that has never existed is unprecedented. It decomposes organic substances with weak light intensity. Further, by adding a semiconductor or conductive fine particles that lower the surface resistance value of the film itself, an antistatic effect on the surface of the coating film can be obtained, so that the adhesion of dirt due to static electricity is reduced.

By installing the member having the above-described action according to the present invention at the portion where the air flows in various devices, the attached organic matter can be effectively decomposed, and the air flow is generated. Any product can be easily applied as long as it is a device having a structure that allows the air flow or filters the air flow.

As an example, as a heating appliance, it can be applied to an oil fan heater, a gas fan heater, an electric heater, a kotatsu, or the like. The same can be applied to an air conditioner, a dehumidifier, or a cold air fan. It can also be applied to heating type and ultrasonic type humidifiers. It can also be applied to cookware such as ovens and electromagnetic cookers. It can also be used as a hair dryer. It can also be used in devices equipped with a cooling fan. In other words, various computers such as personal computers and word processors, displays of these computer devices such as cathode ray tubes, devices that use electrophotographic mechanisms such as copiers and laser beam printers, devices such as liquid crystal projectors and slide projectors. In addition to the low temperature of the present invention, the attached cooling fan part, the intake port and the exhaust port part used for ventilation of cooling air using the cooling fan of these devices, and the filter part attached to these intake and exhaust port parts A curable high activity oxide photocatalyst thin film can be provided, and the same effect can be obtained.

[0188]

The effects of the present invention are summarized below.

In the present invention, a mechanism for generating an air flow by an electric motor, such as an air purifier, a ventilation fan, a fan, a vacuum cleaner, a clothes dryer, a tableware dryer, a dishwasher, and a garbage processor, is mainly incorporated. Since a low-temperature curing type highly active oxide photocatalyst thin film was provided in the flow path of the air, the filtering part, the exterior part, and the part illuminated by the built-in lighting mechanism of electrical products used in the indoor environment, It is possible to obtain the effect like.

According to the present invention, there are roughly three effects.

First, according to the present invention, a conventionally known thin film of an oxide photocatalyst such as TiO ₂ containing Na, Li and the like has an electronegativity of less than 1.6 and an ionic radius of 0.2.
The effect of decomposing organic substances was enhanced by adding ions having a valence of 2 or less, which are elements smaller than nm.
Furthermore, in addition to this, an oxide semiconductor of a metal having an electric affinity of 1.2 or more, including antimony-added tin oxide, or metal fine particles of Ag, Cu, Ni, Pd, Rh, Pt, is added in combination. Then, the decomposition efficiency was further increased.
As a result, it is possible to obtain an effect that a mechanism for generating light having a short wavelength, such as an ultraviolet lamp, which is required in the conventional oxide photocatalyst, is unnecessary. In other words, generally, as the light obtained indoors, even non-weak light such as a fluorescent lamp, an incandescent lamp, a mercury lamp, and sunlight through a window glass decomposes organic substances and attaches oils such as cigarette tar and hand oil. Even if dirt from a kimono adheres, it decomposes and provides an antifouling effect. Similarly, with weak light, when various malodorous substances such as organic amines and mercaptans that disperse in the air adhere, they are decomposed and decomposed into low-odor or odorless substances. A deodorizing effect of reducing odor can be obtained. In addition, when various microorganisms such as bacteria, molds, pollens, etc. floating in the air are attached by weak light, the microorganisms are killed or their reproduction is suppressed by the action of decomposing organic matter. The surface of the member formed with is kept clean, and at the same time, the effect of reducing the amount of microorganisms floating in the air in the room where these products are used can be obtained. Conventionally, these air filtering parts such as filters and nets are often treated as replacement parts, and when they become dirty or become clogged, they can be taken out and washed, or replaced with new ones. However, according to the present invention, since the adhered dirt is decomposed, the life until reaching the clogging can be extended and the replacement frequency can be reduced.

Examples of specific effects in each application are shown below. Indoor lighting and sunlight are radiated to the outer frames and frames of air purifiers, ventilation fans, electric fans, vacuum cleaners, clothes dryers, dish dryers, dishwashers, garbage disposal machines, and exterior parts such as cases. Therefore, it becomes possible to maintain a clean state that is hard to get dirty and is free from the growth of microorganisms. In addition, the air flow path parts attached to these articles, the filters in the air flow path, and the parts such as nets can also be installed so that they are illuminated by indoor lighting or sunlight, Not only antibacterial but also indoor deodorizing effect can be obtained.

Regarding the antifouling effect, an air purifier, a ventilation fan, a fan, and a vacuum cleaner may be provided with an infrared ray receiving section in the main body and an infrared ray transmitting section in the remote controller section for remote control. It also has an effect of preventing the problem that the signal is transmitted and received due to dirt on the infrared transmitting and receiving section.

Generally, when the load of dirt is so great that decomposition is not sufficient due to the intensity of light obtained indoors, or when it is desired to use it for a member that does not receive sufficient indoor light, a lighting means such as a fluorescent lamp or a light bulb is used. The effect is obtained when attached. Further, if the amount is still insufficient, a high decomposition effect can be obtained by additionally providing an ultraviolet ray generating means such as a mercury lamp or a metal halide lamp. In such a case, according to the present invention, since the decomposition efficiency is higher than in the past, the lighting time of the lamps can be shortened and the output of the lamps can be reduced, so that the power consumption can be saved and the life of the lamps can be reduced. Also, it has the effect of requiring less frequent replacement.

As an example, when a large amount of malodorous substances generated from the garbage processing machine is decomposed or a large amount of edible oil is attached like a kitchen ventilation fan, a dishwasher, a tableware dryer,
When it is necessary to clean the inside of a closed tank or the inside of a drum like a clothes dryer, it is effective to use the above-mentioned light generating means of various wavelengths together.

Secondly, in the present invention, as described above, the photocatalytic thin film contains an antimony-added tin oxide or the like, and an oxide semiconductor of a metal having an electric affinity of 1.2 or more, or Ag, C.
Since metal fine particles of u, Ni, Pd, Rh, and Pt are added, the surface resistance value of the film itself can be suppressed low. The effect of this is that large-sized dust and fibers, which take time to disassemble,
Alternatively, it becomes possible to suppress the phenomenon that minerals such as soil that cannot be decomposed adhere to each other due to static electricity. Due to this action, it is possible to suppress the phenomenon that hardly decomposed stains are accumulated on the surface and light cannot reach the photocatalyst thin film surface.

This antistatic effect is effective not only for preventing dirt due to adhesion of dust or the like but also for preventing malfunction of an electronic circuit due to electrostatic charging. In particular, the effect is great for articles such as a vacuum cleaner that are likely to be triboelectrically charged during use.

Specific examples of effects in each application are shown below. Outer frames and frames of air purifiers, ventilation fans, fans, vacuum cleaners, clothes dryers, dish dryers, dishwashers, garbage disposal machines, and exterior parts such as cases are particularly effective because dirt easily attaches to them. .

Thirdly, in the present invention, when forming a photocatalytic thin film having the above effects, it is prepared from a solution containing a low molecular weight organometallic compound and water, and the metal atom and the organic group are bound to each other. By irradiating an electromagnetic wave having a necessary specific wavelength including ultraviolet light or the like to destroy the film, the reaction for forming a film is promoted, and thus it has become possible to form a thin film at a lower temperature than before. For this reason, the surface of general-purpose plastics such as ABS, PS, PP, polyester, etc. used for electrical products such as those mentioned above and organic paints applied to steel plates are softened by heat to the base material, Transformation,
It has become possible to form the above oxide photocatalyst thin film without causing defects such as bubble generation, crack generation, embrittlement, strength reduction, and toughness reduction.

Examples of specific effects in each application are shown below. Molded product or painted steel sheet of synthetic resin, which is usually used for outer frames and frames of air purifiers, ventilation fans, fans, vacuum cleaners, clothes dryers, tableware dryers, dishwashers, and garbage processing machines and exterior parts of cases. The class is 300 ° C, which is the thin film formation temperature of conventional oxide photocatalysts mainly composed of TiO _2.
Although it could not withstand the above high temperature, according to the present invention,
The film can be easily formed without thermally damaging the base material on the surface of these components.

Further, the air flow path parts attached to the above-mentioned articles, fans, blades, filters, etc. in the air flow path,
Similarly, it was extremely difficult to form a net-type component from a material that can withstand a heat treatment at 300 ° C. or higher, but the present invention makes it possible to easily form the above oxide photocatalytic thin film.

As another effect, since the oxide photocatalyst thin film according to the present invention can form a hard film at low temperature, it can be used as a substitute for a hard coat such as an acrylic resin which is conventionally coated on the surface of a plastic molded product. There is also an effect.
As a result, the gloss of the molded product can be increased and the surface can be prevented from being scratched as in the case of the conventional hard coat, and further, the effect of suppressing the growth of microorganisms, the antifouling effect and the antistatic effect can be obtained.

In the case of application to filters made of non-woven fabric, woven fabric, sponge, etc., since the oxide photocatalytic thin film formed on the fiber surface is glassy, the surface has good adsorbability and wettability. Become. Therefore, there is an effect that the efficiency of collecting odor and collecting smoke particles is improved. Even if a thin film of SiO ₂ alone is formed, the collection efficiency is improved by the same principle, but the collection effect is reduced when odors and smoke particles cover the fiber surface by adhesion, but in the present invention, this glassy material is used. Since the film itself has a photocatalytic property, the fiber surface is always cleaned and the substrate having a high adsorptivity is continuously exposed, so that the effect is maintained.

Furthermore, in the case of a dishwasher, the contact angle of water droplets adhering to the inside can be reduced by utilizing the antifouling effect of the photocatalyst. As a result, the total amount of residual water can be reduced, which has the effect of increasing the drying efficiency of tableware. By utilizing this effect, it can be applied to various applications where it is difficult to get dew.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a filter type air purifier body according to an embodiment of the present invention.

FIG. 2 is a perspective view of a filter type air purifier body according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of an electrostatic precipitator-type air cleaner body according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of the kitchen ventilation fan main body according to the embodiment of the present invention.

FIG. 5 is a cross-sectional view of the fan body according to the embodiment of the present invention.

FIG. 6 is a perspective view of the vacuum cleaner according to the embodiment of the present invention.

FIG. 7 is a cross-sectional view of the cleaner body according to the embodiment of the present invention.

FIG. 8 is a sectional view of the main body of the clothes dryer according to the embodiment of the present invention.

FIG. 9 is a perspective view of the tableware dryer main body according to the embodiment of the present invention.

FIG. 10 is a cross-sectional view of the tableware dryer main body according to the embodiment of the present invention.

FIG. 11 is an enlarged cross-sectional view of the exhaust port portion of the tableware dryer according to the embodiment of the present invention.

FIG. 12 is a perspective view of the dishwasher body according to the embodiment of the present invention.

FIG. 13 is a cross-sectional view of the dishwasher main body according to the embodiment of the present invention.

FIG. 14 is a cross-sectional view of the dishwasher main body according to the embodiment of the present invention.

FIG. 15 is a perspective view of the garbage processing machine main body according to the embodiment of the present invention.

FIG. 16 is a cross-sectional view of the garbage processing machine main body according to the embodiment of the present invention.

FIG. 17: TiO ₂ dispersion S formed on a PET film
It is a sectional view of an iO ₂ film.

FIG. 18 is a cross-sectional view of a low temperature curing type high activity photocatalyst thin film formed on an adherend.

FIG. 19 is a cross-sectional view of a low temperature curable high activity photocatalyst thin film formed by laminating two layers on an adherend.

FIG. 20 is a diagram showing the results of a decomposition test of organic dyes.

FIG. 21 is a diagram showing the relationship between electronegativity and decomposition rate.

FIG. 22 is a diagram showing the relationship between electronegativity and ionic radius.

FIG. 23 is a diagram showing a smoke collecting effect of a low temperature curable high activity photocatalyst thin film.

FIG. 24 is a diagram showing a photolytic effect of a smoke adhering filter.

FIG. 25 is a diagram showing an ammonia-collecting effect of a low-temperature curing type high activity photocatalyst thin film.

FIG. 26 is a diagram showing the photolysis effect of ammonia gas.

FIG. 27 is a diagram showing a photolytic effect of a smoke-adhering ABS plate.

FIG. 28 is a diagram showing a photolysis effect of salad oil.

[Explanation of symbols]

1 ... Air purifier body, 2 ... Panel (suction port), 3, 36
… Filter, 14… Grill, 15, 20, 89, 12
8, 152, 175 ... Exhaust port, 19, 117, 174 ...
Intake port, 21 ... Pre-filter, 24 ... Ozone removal filter, 30, 43 ... Electric motor, 31, 41 ... Blade, 33
... Orifices, 34, 133, 158 ... Fluorescent tubes, 38 ...
Fan body base part, 39 ... Struts, 40 ... Slide pipe, 42 ... Guard, 45 ... Net, 50 ... Vacuum cleaner body,
62 ... Dust collection chamber, 70 ... Electric blower part, 73 ... First exhaust ventilation passage, 74 ... Second exhaust ventilation passage, 75 ... Exhaust ventilation passage,
76 ... Exhaust ventilation part, 79 ... Paper filter, 82 ... Auxiliary filter, 84, 129, 182 ... Exhaust filter, 8
5 ... Outer frame, 98 ... Circulation duct, 106 ... Main body, 107 ... Drying chamber, 116 ... Intake filter, 131, 151 ... Exhaust duct, 134 ... Lighting fixture, 135 ... Outer frame, 136 ... Dish storage tank, 155 ... Blower Unit: 156 ... Blower fan, 159 ... Lighting equipment, 160 ... Frame, 161 ... Stirring blade, 163 ... Raw garbage input port, 164 ... Treatment tank, 173 ...
Ventilation fan, 184 ... UV lamp, 185 ... PET film, 186 ... SiO ₂ film, 187 ... TiO ₂ particles, 1
88 ... TiO ₂ dispersed SiO ₂ film, 189 ... Plastic adherend, 190 ... Lithium, 191 ... Highly active photocatalyst film, 19
2 ... Antistatic base layer, 193 ... Antimony-added tin oxide, 194 ... Highly active photocatalytic film.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI D06F 58/00 F24F 7/00 A F24F 7/00 7/013 101G 7/013 101 B09B 3/00 ZABD (72) Inventor Shimazaki Noriko 1-1-1 Higashi-Taga-cho, Hitachi-shi, Ibaraki Electric Appliances Division, Hitachi, Ltd. Taga Headquarters (72) Inventor Yuka Hirota 1-1-1 Higashi-Taga-cho, Hitachi, Hitachi Ibaraki Department Taga Headquarters (72) Inventor Tetsuo Ishikawa 1-1-1, Higashitaga-cho, Hitachi-shi, Ibaraki Hitachi Co., Ltd. Electric Appliances Division Taga Headquarters (56) Reference JP-A-7-171408 (JP, A) JP-A 8-266605 (JP, A) JP-A 9-38189 (JP, A) JP-A 7-303819 (JP, A) JP-A 7-108175 (JP, A) Kaihei 8-243402 (JP, A) JP 8-182934 (JP, A) JP 5-148380 (JP, A) JP 6-136162 (JP, A) International Publication 97/010186 (WO , A1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B01J 21/00-38/74 CA (STN)

Claims (8)

(57) [Claims] 1. Dust, oil particles, or smoke floating in the air, which is obtained by driving an electric blower to take in indoor air from an intake port and passing it through a filter provided in a ventilation passage. In an air purifier that collects and purifies pollen, various microorganisms, and malodorous substances, and then discharges it from the exhaust port, among the components, there are parts that are exposed to indoor illumination light or outdoor sunlight. A coating film in which TiO ₂ fine particles are dispersed is formed on the surface by curing at a temperature of about 120 ° C. , and the coating film has an electronegativity of less than 1.6 and an ionic radius of 0.2.
A nm smaller element, atomic number is 2 or less
Na, was added Li, Mg, any ions Ca
Air purifier having a photocatalyst thin characterized and this. 2. The air taken in from an indoor air inlet by an air flow generated by driving an electric blower, together with floating dust, oil particles, smoke, pollen, various microorganisms, and malodorous substances. In a ventilation fan that exhausts air from the outside exhaust port to the outside of the room, among the components, the surface of the parts that are exposed to indoor illumination light or sunlight from the outside is coated with TiO ₂ fine particles at a temperature of about 120 ° C. It is formed by curing and has an electronegativity of less than 1.6 and an ionic radius of 0.2 in the coating film.
A nm smaller element, atomic number is 2 or less
Na, was added Li, Mg, any ions Ca
Ventilator with a photocatalytic film it characterized and this. 3. A fan in which blades are rotated by an electric motor to generate an air flow, and among the constituent parts, a surface of a part which is exposed to indoor illumination light or outdoor sunlight is coated with TiO ₂ fine particles dispersed therein. The film is formed by curing it at a temperature of about 120 ° C. , and the film has an electronegativity of less than 1.6 and an ionic radius of 0.2.
A nm smaller element, atomic number is 2 or less
Na, was added Li, Mg, any ions Ca
Fan having a photocatalytic film you characterized and this. 4. A suction port and a dust collection chamber are communicated with each other, and the air pressure in the dust collection chamber is reduced by an electric blower,
In a vacuum cleaner that collects dust and dirt taken in from the suction port into the dust collection chamber, filters the dust and dust, and then discharges air from the exhaust port, the indoor lighting light or the outside A coating film with TiO ₂ particles dispersed on the surface of parts exposed to sunlight is about 120 ° C.
Formed by being cured at a temperature of 10 nm, and having an electronegativity of less than 1.6 and an ionic radius of less than 0.2 nm in the coating film, and having a valence of 2 or less , Na, Li, M.
Characterized by adding one of g and Ca ions
Cleaner having a photocatalytic film that. 5. An air blown from the outside by an electric blower is heated by a heater for heating into a drying drum containing clothes containing moisture, which is then sent to heat the clothes to evaporate the water content. A part of a clothes dryer that discharges air containing water from the exhaust port, or dew it by using a heat exchanger to remove the water and then exhaust it from the exhaust port. on the surface of the coating film TiO ₂ fine particles are dispersed about 120 ° C.
Formed by being cured at a temperature of, Na, Li, M having an electronegativity of less than 1.6 and an ionic radius of less than 0.2 nm and a valence of 2 or less.
Characterized by adding one of g and Ca ions
Clothes dryer having a photocatalytic film that. 6. The air taken in from the outside by an electric blower is heated by a heater for heating into a drying chamber containing wet tableware, and then sent to heat the tableware to evaporate the attached water. In a tableware dryer that discharges this air containing moisture from the exhaust port, a coating film in which TiO ₂ fine particles are dispersed is applied to the surface of parts exposed to indoor illumination light or sunlight from outside at about 120 ° C.
Formed by being cured at a temperature of, Na, Li, M having an electronegativity of less than 1.6 and an ionic radius of less than 0.2 nm and a valence of 2 or less.
Characterized by adding one of g and Ca ions
Dish dryer having a photocatalytic film that. 7. After washing water in a washing tank containing soiled dishes, water is pressurized by a washing pump while being heated and sprayed from a rotatable arm nozzle provided in the washing tank to wash the dishes. After performing the rinsing operation, the outside air is sucked in by the electric blower, and the cold air or the heating air is warmed by the heater to replace the high-humidity internal air after the rinsing operation, and the inside of the dishes and the washing tank. In a dishwasher that evaporates and dries the residual water in the room, a coating film with TiO ₂ particles dispersed on the surface of parts exposed to indoor lighting or sunlight from around 120 ° C
Formed by being cured at a temperature of, Na, Li, M having an electronegativity of less than 1.6 and an ionic radius of less than 0.2 nm and a valence of 2 or less.
Characterized by adding one of g and Ca ions
Dishwasher having a photocatalytic film that. 8. A food waste is put into a treatment tank in which a culture substrate containing microorganisms is installed, and the food waste is stirred together with the culture substrate by using a stirring device, and the food waste is removed by the metabolic action of the microorganisms. In a kitchen treatment equipment that decomposes and discharges the moisture generated during decomposition with the air using an electric blower, a coating film in which TiO ₂ particles are dispersed is applied to the surface of parts exposed to indoor illumination light or sunlight from outside. About 120 ℃
Formed by being cured at a temperature of, Na, Li, M having an electronegativity of less than 1.6 and an ionic radius of less than 0.2 nm and a valence of 2 or less.
Characterized by adding one of g and Ca ions
Garbage processor equipped with a photocatalytic film that.